Males of the superb bird of paradise aggregate during the breeding season in leks where they display to females. females chose a particular male as a mate, and after mating, go off and raise the offspring on their own. males perform an elaborate display. females are more likely to mate with males that have longer and more variable displays. the most likely explanation for female preferences is:

i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.

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.

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added

whats the drop down answers ?

explanation: