I WONDER - Why Do We Get Goose Bumps? Me Pregunto - Qué Son La Piel De Gallina?

Goosebumps are a natural reaction that helps keep us warm by causing hairs on our arms to stand up, trapping hot air and increasing body temperature. This mechanism is also effective in animals, especially those with more hair.

What is the significance of the skin's reaction that causes goosebumps?

In what way do animals benefit from having goosebumps?