Answer - B - When cultures grow and adapt repeatedly to their ever-changing environment, it is called multilinear evolution.
Key Takeaway: In the mid-19th century, a cultural anthropologists named Julian Steward called attention back to the Darwinian notion of "adaptation," arguing that societies must always adapt to their environment in some way. Steward basically argued that cultures do not change according to an inner logic, but rather change in response to their ever-changing environment. He called his theory "multilinear evolution."