as you move up each trophic level energy decreases, trophic levels need energy to sustain it and hence it which means more resources, which decreases the number of organisms.
b. energy transferred from the sun to plants and then to a series of living things.
option a - density = mass/volume
density can be determined using the formula. density = mass/volume. density is an analysis that examines the quantity of matter an object has to its volume. the substance which has enough material contains high density and the substance which possesses less stuff with the same volume has less density so the relationship between mass and density is direct and inverse between an object with enough matter in a certain volume has high density. an object with little matter in the same amount of volume has a low density. density is found by dividing the mass of an object by its volume.