What is an ecological pyramid with explanation

What causes the force that pushes magma from the magma chamber through the pipe and vent of a volcano?

Consider the following planned experiment. factor experimental group control group light exposure tots of sun tots of sun amount of water weekly weekly type of soil nutrient rich nutrient rich size of pot large which variable is being tested in this experiment? small a. size of pot b. type of soil c. light exposure d. amount of water

Match each description to the level of organization