Why do snakes shed their skin?

Answer: To grow bigger

To grow bigger ✓ — Correct! Snake skin doesn't grow with their body, so they must shed (ecdysis) to accommodate growth. Young snakes shed every few weeks, adults several times yearly. Shedding also removes parasites, repairs damage, and refreshes eye scales. The entire outer layer comes off in one piece!

Old scales become too heavy — Wrong. Snake scales don't accumulate weight over time. The shed skin weighs almost nothing! Snakes shed because their skin doesn't stretch with growth—young snakes growing rapidly shed more frequently than adults.

When skin gets dirty — Wrong. Cleanliness isn't why snakes shed. Their skin doesn't grow, so they must replace it as they grow larger. Shedding is a growth-related process, not a hygiene one.