Identify the feature of the ocean floor covered by the green box. A. Coral Reef

B. Abyssal Plain

C. Beach

D. Mid-Ocean Ridge

CO2 and H2O

Explanation:

First of all, I'd suggest to write the question more clearly. You should write the arrow to show how this reaction goes. I assume this is a classical combustion reaction, in which a substance, in this case an alkane (a compund made only of C and H and only has single bonds between Cs) reacts with oxygen. When this reaction happens, all the C that were bond to another C or to H will be finally bonded to O (this is what you can see in the CO2 as the final product). The same happens with the H atoms! They're not bonded to C anymore, they're now bonded to O.

It's usually said that C and H are oxidized in the products (CO2 and H2O)