Which statement describes a constructive force that shapes Earth's surface? A glacier pushes rocks and soil.
Tectonic forces push mountains up.
Ocean waves erode rock and create a cliff.
A stream carries away sediment from banks.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

the generally accepted parts of modern cell theory include: all known living things are made up of one or more cells. all living cells arise from pre-existing cells by division. the cell is the fundamental unit of structure and function in all living organisms.