What is a type of reaction that occurs when you burn something? (combine it with oxygen)

Combustion is the scientific word for burning. In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat. This is why you see flames when things burn.

The correct answer is D.) The gene that controls production of white blood cells.

It is because white blood cells or leukocytes primarily serve the function of protecting our body against the foreign particle or invader such as bacteria, virus etc.

Therefore, their number will increase many folds in our body during the diseased condition such as influenza in this case. Influenza is caused by influenza virus and is commonly known as flu.

In order to increase the number of white blood cells (such as eosinophil, basophil, monocytes, lymphocytes etc) in our body, the gene controlling their production will express more.