Detailed Instructions: Given a scientific passage and an answer, generate a question for the given answer.
Problem:Passage: The human nerve cell in Figure below is a good example of a specialized animal cell. Its shape suits it for its function of sending nerve signals to other cells. A nerve cell couldn't take this shape if it were surrounded by a rigid cell wall. Answer: specialization
Solution:
With a shape that specially suits its function of sending nerve signals to other cells, the human nerve cell is an example of what?