The gradual decline in men's testosterone levels in middle age can reduce their:

• A. visual acuity
• B. sex drive and energy levels
• C. risk of osteoporosis
• D. ability to digest lactose

Answer: (B)

Verified step by step guidance

1. Step 1: Understand the role of testosterone in the male body, particularly how it influences various physiological and psychological functions.
2. Step 2: Recognize that testosterone is a key hormone affecting sex drive (libido) and energy levels in men, especially during middle age.
3. Step 3: Consider that visual acuity, risk of osteoporosis, and lactose digestion are not primarily regulated by testosterone levels.
4. Step 4: Recall that a decline in testosterone typically leads to reduced sex drive and lower energy, which are common symptoms reported during middle age.
5. Step 5: Conclude that the correct association with declining testosterone levels in middle-aged men is a reduction in sex drive and energy levels.