Most organisms must
fit in with
their surroundings because their skills to alter their environment are restricted and highly specialized.
【正确答案】
D
【答案解析】解析：句意：大多数有机体必须适应周围的环境，因为它们改变周围环境的能力有限而且专一。fit in with适合，符合。adapt to使适应。attach to缚上，隶属于。lean on靠着。