Question

why would a lizard need to disconnect its tail iready

Answer 1

Answer:

cause the tail does it propagation again I guess

Answer 2

$\huge\bold{\textbf{\textsf{{\color{cyan}{Answer}}}}}$

The main reason a lizard loses its tail is to defend itself. When a lizard detaches its tail, the tail whips around and wiggles on the ground. Nerves from the lizard's body are still firing and communicating with each other.

This distracts a predator and gives the lizard plenty of time to escape.