Question

3.

A(n) reaction happens when
chemical bonds give off heat.
A.
Endothermic
B.
Exothermic
Metallic
C.
D.
Covalent
PLEASE HELP

Answer 1

A endothermic

Step-by-step explanation:

when two objects rub each other to form heat.

it is also known as friction force

Answer 2

it's A endothermic its when two objects rub each other to form heat this is also known as friction force