Which two factors are most likely to cause a plants guard cells to open its stomata. Please help, I was seeing different responses to this question:)

The image shows embryos of three vertebrate classes

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient