Answer: How to protect the environment
The cycles within which earth's matter moves are closed systems. This means nothing is gained or lost from the system; it only changes from one form to the other. The total amount of matter on earth remains the same. Using tectonic plates as an example, divergent boundaries occur where new oceanic crust is being created. New crust is being created and simultaneously the same amount of crust is being destroyed at convergent margins.
Protozoa are single celled organisms. They come in many different shapes and sizes ranging from an Amoeba which can change its shape to Paramecium with its fixed shape and complex structure. They live in a wide variety of moist habitats including fresh water, marine environments and the soil.
Some countries trash rivers which sometimes can end in the ocean because they are connected.
The answer to this question is: (B) <span>evaporation is necessary to the water cycle and precipitation is not always necessary.
In water cycle, the fastest way for nature to distribute is through the rain. Before the rain could happen, Evaporation from the water surface on the earth is necessary to transform water into air that will become the cloud. After that, the clouds will undergo the condenstaion process and transformed into rain.
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