Which process is the main source of movement

Which of these is the most likely consequence of falling petroleum price

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.