From an energetic standpoint, why is biting considered a costly action for the snake?

Answer

It demands significant venom production and causes momentary vulnerability during recovery

Producing venom is an energetically demanding process, and the snake must expend resources and remain momentarily vulnerable while replenishing its venom reserves after a bite.

From an energetic standpoint, why is biting considered a costly action for the snake?
venomreptilesnakeRattlesnakeaggressivity