Humans use many chemical substances for farming that consequently affect biodiversity. These compounds, which are rich in nitrogen and phosphorus, are used to fertilize crops. Excessive use of these compounds causes , which leads to
in bodies of water

cell regulation is conducted by special proteins.

it's not c. i took the quiz and got it wrong. so my best guess is b.

have a great day, and hope this .

the answer is z.

the human body has five levels of organization. level 1: cells. cells are the basic units of life and form the first level of organization. cells in the human body have specific functions. examples include nerve cells, blood cells, liver cells, and so on.