Please help!! thank you for 27 and 28

What in scientific term why the salty popcorn causes this thirst

Resperation is a way to release carbon back into the atmosphere

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england