Question

what does wood combine with when it is burned?
a water
b it doesnt combine with anything
c carbon dioxide
d oxygen

Explanation:

Burning is a chemical reaction called combustion. Combustion of wood (which is mainly composed of carbon - based compounds) requires oxygen. When wood burns, the carbon and hydrogen in it react with oxygen. Water (\(H_2O\)) is a product of combustion (from hydrogen reacting with oxygen), carbon dioxide (\(CO_2\)) is also a product (from carbon reacting with oxygen). And it is clear that wood combines with something (oxygen) when it burns.

Answer:

d. oxygen