Which is one way that the movement of matter through an ecosystem is different from the transfer of energy ?

Movement of matter passes through the ecosystem in the form of cycle, web, chain etc., between the living and non-living things. The base is the energy derived from sun. They involve all living organisms, air, water, soil etc. Matter never gets wasted instead utilized.

Matter is recycled in the ecosystem but energy is not. Energy is transferred from one organism to another approximately by 10% where balance of 90% is lost in the form of energy. The higher the levels in the food chain more exhaustion of energy due to work.  

the sphincter muscles at the end of the digestive tract is the anus.

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.