. . . . . . . . acts as the precursor for ecdysone synthesis.

Answer: Option B

Cholesterol acts as the precursor for ecdysone synthesis.
Ecdysone is the major steroid hormone in insects and plays essential roles in coordinating developmental transitions such as larval molting and metamorphosis through its active metabolite 20-hydroxyecdysone.
Ecdysone, like the vertebrate steroid hormones, is synthesized from cholesterol.