Detailed Instructions: You are given a science question (easy-level) and four answer options (associated with "A", "B", "C", "D"). Your task is to find the correct answer based on scientific facts, knowledge, and reasoning. Do not generate anything else apart from one of the following characters: 'A', 'B, 'C', 'D'. There is only one correct answer for each question.
Problem:Habitat becomes a major factor in the extinction of a species when
(A) genetic diversity is not achieved. (B) competitive species are introduced. (C) changes in behavior start to develop. (D) smaller populations fail to breed.
Solution:
B