Which heron is affected by many factors in its environment. What distinguishes the biotic factors from the abiotic factors? A. location in the water or out of the water
B. plant or animal
C. living or nonliving
D. food or not food

Johnny rode his bike to a friend's house 4 blocks down the street in his neighborhood. he immediately rode back home once he realized his friend was not able to play. what was his displacement for the total bike ride? how did you determine this? what could we use as a reference point to determine he was in motion during his bike ride? why can you use it as a reference point