Male Australian bowerbirds build and decorate elaborate structures, called bowers, out of grasses and other vegetation. If we want to understand how this behavior promotes a male bowerbird's ability to survive and reproduce, we want to understand its:

a. causation.
b. development.
c. adaptive function.
d. evolutionary history.
e. genetic basis.

Option C, adaptive function

Explanation:

A Male Australian bowerbirds builds a distinctive nest which is attractive enough to attract a mating partner. Here the bowerbirds is adapting to the environment without affecting others but enhancing its own chances of survival and reproduction. So here we can say that male bowerbirds uses its brain and cognitive systems to build bowers thereby giving rise to behavioural competition thereby establishing behaviorally conditioned reproductive isolation

Hence, option C is correct

not only is it colder, it also becomes darker, less salty, and more dense.

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.