Which mechanism prevents precocious metamorphosis from larval to pupal stage in insects?

💡 Explanation

When juvenile hormone (JH) concentration remains high, it suppresses metamorphosis because JH sustains the larval stage by antagonizing ecdysone's effects, thus ensuring sufficient growth periods. Therefore inhibition of its production triggers metamorphosis, rather than initiating ecdysis, downregulating PTTH, or directly using ecdysone.

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