Chemical reactions -
a. produce new substances.
b. create and destroy atoms.
c. occur only in living organisms .
d. only occur outside living organisms.

it should be all of them because it asks if you included all of those in your answer

explanation:

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates

hurricanes form in warm water

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).