I think it might be the first one: hiv infections. (hope this helps!)
The examination or observation of one's own mental and emotional processes.
Answer: the study of living organisms, divided into many specialized fields that cover their morphology, physiology, anatomy, behavior, origin, and distribution.
or
the physiology, behavior, and other qualities of a particular organism or class of organisms.
and
the plants and animals of a particular area
I think it is D for mountains form from the movement of tectonic plates which create volcanoes that erupt and form mountains
Answer:
Opossums eat at night and eat mostly plants.
Explanation:
