What does a biology community consist of?

If a force of 40 newtons moves a cart a distance of 9 meters, the work done is nm. if the same force moves the same cart three times that distance, the work done is nm.

About which of these did darwin have a poor understanding? a) that much of the variation between individuals in a population is inherited b) the factors that cause individuals in populations to struggle for survival c) the sources of genetic variations among individuals d) that individuals in a population exhibit a good deal of variation e) how a beneficial trait becomes more common in a population over the course of generations

Does biology or the environment affect human development more? explain.