Nitrogen fixation is a process in which nitrogen (N2) in the Earth's atmosphere is converted into ammonia (NH3). Atmospheric nitrogen or molecular dinitrogen (N2) is relatively inert: it does not easily react with other chemicals to form new compounds.
A mutualistic and A a decrease in the number of corals
After a caterpillar eats a leaf, it can convert the chemical energy into mechanical energy to help it build a cocoon.
<em>it would be b and c</em>
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<em>it's the whole ''ecosystem''</em>
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