Answer:
Heterotrophs
Explanation:
A heterotroph is an organism that eats other plants or animals for energy and nutrients.
Global warming affects the spread of animals because different areas will become suitable for different species, so they spread out. This can cause diseases to spread, as the animals may bring them with them. This can also happen in the opposite direction, where the climate change causes less habitats to be suitable for animals, so they become more sparse
The answer should be proteins. Because the protein is consists of different kinds of amino acids(usually 20 in total). And our cell can not produce essential amino acids itself.
Man tough call I between b and d. But I might go more for B by the fact that the population will be increasing.
Hope this helps!
