How can one single person the environment?

they can start doing little things that helps the environment that can make others think "i can do that" which then makes more people doing the same thing

They can help with trash by roads or the beach

a mother eats twice as much to support her growing fetus

limiting sugar intake in a mother with gestational diabetes, switching from diving to swimming.   depending on whether the patient is normal weight, over weight or gain will differ depending on that.

answer; i believe the correct answer is (progesterone);