The answer is in the image attached.
Hope this helps!
Bacteria<span> can </span>obtain energy<span> and nutrients by performing photosynthesis, decomposing dead organisms and wastes, or breaking down chemical compounds.</span>Bacteria<span> can </span>obtain energy<span> and nutrients by establishing close relationships with other organisms, including mutualistic and parasitic relationships.</span>
Explanation:
Mycotoxicosis is the correct answer
A: That answer is illogical at best
B: It makes sense, the smaller you are, the less food you need
C: This would need extensive studying of key deer ancestry to figure out
D: This could work over thousands of years. But an overpopulation of one wouldn't push out the other. Ungulates (hooved mammals) of different species often work together.
B, sounds like your best choice.