Question

an incorrect answer wouldnt break your streak.
combustion is another word for

a dog
a train
burning
a bus

Explanation:

Combustion in chemistry (a subfield of Natural Science) refers to the process of burning, where a substance reacts with oxygen to produce heat and light. Among the options, "burning" matches the definition of combustion. The other options (a dog, a train, a bus) are unrelated to the term combustion.

Answer:

C. burning