Final answer:
Low energy availability in female athletes can lead to reduced estrogen production, the "switching off" of the menstrual cycle, and an alteration of the normal pattern of release of luteinizing hormone (LH).
Step-by-step explanation:
Low energy availability in female athletes can lead to reduced estrogen production, the "switching off" of the menstrual cycle, and an alteration of the normal pattern of release of luteinizing hormone (LH). When energy availability is low, females prioritize survival over reproduction, resulting in these changes. Therefore, the correct answer is d. All of these answers are correct.