Which most an animal do in order for cellular respiration to begin?

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?

What would happen if the krill were removed from the food web

Based on the topographic map of mt. st. helens, what is the contour interval of the volcano about height is 2,950 m?