system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do bugs all have more than four legs, while basically every other terrestrial animal has four or less?
gpt
Insects' evolutionary journey favored 6 legs. Ants can carry items with the front legs and still have 4 legs for balance and weight distribution. A beetle with a big ass has 6 legs to stabilize all that rear weight. Climbing walls with 6 feet means more contact with the wall at any given time. 
Think of ants digging out s tunnel or bees finding pollen or s dung beetle rolling up poop. Think of a butterfly emerging from a cocoon or a moth landing on a vertical surface. Every action is easier because of the multiple points of contact. Even flipping over if they're upside down is easier with 6 long, multiple-jointed, centrally-anchored legs.