I can explain

While Lith was walking around, one of the kids climbed the oak tree and tried to snap off a branch.

The other kid walked around and picked up a few large rocks.

"Did you make a spear?" the kid on the ground asked after picking up the rocks.

However, he saw the other kid gasping for air atop the oak tree.

"Can't you even break a branch?" the kid on the ground made a snide remark.

The kid on the oak huffed angrily at the comment.

The branch of the oak tree was stronger than he had imagined.

'If only I had taken a knife,' he thought to himself and resumed pulling on the branch.

Two minutes passed, and the kid couldn't snap the branch of the oak at all, not even the thinnest one.

The oak was a rank 1 lifeform and the kid was just a normal person who had just awakened. The disparity in strength was evident.