Are molecules with identical chemical formulas but different three-dimensional structures

Molecules are having the same chemical formula same number of atom but different three dimensional shapes are called isomer. Cis trans isomers maintain the same covalent partnerships,but atom may arranged differently.There are two or more compounds arranged in same molecular formula but different arranged atoms are seen in this molecule with different structure of it.

What do you not know about it

Combustion is the act or process of burning. therefore, i believe the answer is  a: burning wood.