Open the brackets and put the verbs in the proper tense and voice.
The Symbol of Canada
Canada’s vegetation (to be) rich and varied. But one Canadian tree (to become) the most prominent Canadian symbol. Its leaf (to find) in Canadian flag, coat-of-arms, coins, uniforms of Canadian athletes. This tree (to be) maple. Long before the first European settles (to come) there, Canada’s aboriginal peoples (to discover) the food properties of maple juice, which they (to gather) every spring. According to many historians, the maple leaf (to begin) to serve as a Canadian symbol as early as 1700.
Since 1965, the maple leaf (to be) the centerpiece of the National Flag of Canada and it (to become) the most prominent Canadian symbol, nationally and internationally. Maple leaf pins and badges proudly (to wear) by Canadians abroad, and (to recognize) around the world.
Вы́сшее образова́ние, или вы́сшее профессиона́льное образова́ние — уровень профессионального образования, следующий после среднего общего или профессионального образования. Включает в себя совокупность систематизированных знаний и практических навыков, которые позволяют решать теоретические и практические задачи по профессиональному профилю, используя и творчески развивая современные достижения науки, техники и культуры. Высшее образование осваивают в высших учебных заведениях — университетах, академиях, институтах, высших училищах и некоторых колледжах. Согласно всемирному рейтингу QS Higher Education System Strength Rankings 2016 первую десятку стран с лучшей системой высшего образования составили США, Великобритания, Германия, Австралия, Канада, Франция, Нидерланды, Китай, Южная Корея и Япония.
A. The ecosystem includes a complex of living (biotic) and non-living (abiotic) elements, habitat and their interaction with each other to create a continuous cycle of substances and energy
B. Nature needs protection, because man pollutes and destroys it and can cause irreparable harm to it. As an example, waterlogging and salinization of soils, pollution with oil products, radioactive waste and landfills.
C. 1.Physical pollution includes thermal (thermal), light, noise, vibration, electromagnetic, and ionizing pollution.
2.Light pollution is a violation of the natural illumination of the environment. Leads to disruption of the rhythms of activity of living organisms. Increasing water turbidity in water bodies reduces the flow of sunlight to the depth and photosynthesis of aquatic vegetation.
3.Noise pollution. Sound – as a physical phenomenon, is a wave motion of an elastic medium. Noise – any kind of sounds that interfere with the perception of useful sounds or break the silence. The sound frequency range that the human ear perceives is from 16 to 20,000 Hz. Sound waves with a frequency below 20 Hz are called infrasonic, and above 20,000 – ultrasonic.
D. 1.An ecosystem or ecological system is a biological system (biogeocenosis) consisting of a community of living organisms (biocenosis), their habitat (biotope), and a system of connections that exchange substances and energy between them. One of the main concepts of ecology. An example of an ecosystem is a pond with plants, fish, invertebrates, microorganisms that make up the living component of the system, and a biocenosis. The pond as an ecosystem is characterized by bottom sediments of a certain composition...2.Changes made in one component of the ecosystem can lead to adverse consequences in the functioning of the entire ecosystem. Intelligent human activity is not always able to foresee the consequences of its activities.
F. Violation of the ecological balance between natural factors and human activity is a socio-ecological crisis. This means that the balance between the environment and society is broken. This situation can lead to the death of humanity