Population ecology considers all of the following

a)what species live in a given area

b)the size of an area in which the species live

c)the overall health of the population of the species

d)how human can completely exterminate a species if necessary

The correct answer is option D which is, "how human can completely exterminate a species if necessary".

Population is the individual relating to the same specie living in the same area at the same time. Like the population of the cats living in the local jungle.

Ecology is the study and observation based study of species and their relation with their natural environment.

Hence population ecology is the study of a single population with respect to their community.

So all above 3 options A, B and C are related to population ecology except option D.

the right side of the picture going down is:

polymerase

protein

transport vesicle

modified protein

the left side of the picture going down is:

dna helix

single-stranded rna

endoplasmic reticulum

ribosome

golgi apparatus

protein released from vesicle

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volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).