Someone ! ( i already have the first 2 )

Explanation:

Flamingos eat algae, crustaceans, brine shrimp, diatoms, and aquatic plants.  

The hydrangeas need to be grown in acidic soil (pH 5.5 and lower)

When a plant doesn't get enough water, the tips and edges of leaves dry out and turn brown. Ultimately, entire leaves will brown and die. Slow growth.

This results in a limited oxygen supply and plants are not able to breathe.  

As crocodiles are not warm blooded and cannot sit on their eggs, they rely on environmental temperatures to incubate the eggs.  

Desert locusts have two phases, the solitary phase and the gregarious phase. It has been shown that solitary locusts nymphs and adults can behave gregariously within a few hours of being placed in a crowded situation, while it takes gregarious locustsone or more generations to become solitary when reared in isolation.

The cytoelastic sacculus that is filled with pigment, which can be red, yellow, brown or black in color.

i think the answer is a.keratin is the pigment responsible for skin color.

not always but somethings can be reproduced in a laboratory.