Question

why do organisms that are separated from the original group sometimes become a new species through speciation? they actually do not change, at all. their genes are isolated from the original group. they simply want to change so they do change.

Explanation:

Speciation occurs when a group of organisms is separated from the original group. In this new environment, their genes are isolated from the original group. Over time, different selective pressures, mutations, and genetic drifts act on this isolated group. These factors lead to the accumulation of genetic differences. Eventually, these differences become significant enough that the separated group can no longer interbreed with the original group (a key criterion for being a new species). The first option is incorrect as organisms do change over time (evolution is a fundamental concept). The third option is incorrect as it implies a conscious "want" which is not how evolution and speciation work (it's driven by natural processes like natural selection, not a conscious decision).

Answer:

Their genes are isolated from the original group.