As a pot of water boils, the temperature of the the water level drops ?

a.) remains the same
b.) drops
c.) rises

Four types of motile cells in human body?

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Which is an example of a population?