Question

Why is it dangerous to take shelter under tall tree during lightening

Answer 1

whn a lightning strucks a tree during its travel to earth....the tree which is vulnerable catches fire...thus its harmful...

Answer 2

A tall tree might act as an easy and accessible point for lightning to discharge itself into the ground, lightning looks for the shortest way to the ground and a tall tree provides it the perfect way.
So the chances of lightning to strike a tall tree is quite high. Thus, it is adviced not to stand under a tall tree during lightning.