Step 1: Understanding the Concept
The anterior pituitary secretes growth hormone, TSH, ACTH, FSH, LH and prolactin. Damage lowers their secretion.
Step 2: Effect in a child
Too little growth hormone stops normal growth of bones and body, as in pituitary dwarfism.
Step 3: Why the other options fail
Less ACTH shrinks the adrenals rather than stimulating them. Less FSH reduces spermatogenesis. TSH would fall, not increase.
Final Answer:
The physical growth of the body will be hampered.
\[ \boxed{\text{(C) }\text{The physical growth of the body is hampered.}} \]