Why do flowers have pigment, not how but the reason they have pigment

An example of what is geese flying south for the

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

Differentiate renewable and nonrenewable resources