Consider the aquatic phosphorus cycle. on land most phosphorus is found in rocks and minerals. in the oceans, phosphorus is deposited from decomposition, excretion from animals, run-off from the land, and finally of rocks and minerals. a) deposition b) identification c) reformation d) weathering

humans are now responsible for causing changes in the environment that hurt animals and plant species. we take up more space on earth for our homes and cities. we pollute habitats. human activity often changes or destroys the habitats that plants and animals need to survive.

as resources become scarce because of population growth, the growth decreases after few years due to lack of resources and food.