Aerobic exercise leads to stronger muscles that sustain activity for short periods of time.

yes it is   dangerous

explanation:

because that foot is discusting and could get you sick

if you know your abc's you should be able to get your answer or just use google

in a chemical reaction, the atoms and molecules produced by the reaction are called products. no new atoms are created, and no atoms are destroyed. in a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.