Which term best describes an enzyme

Solution :-

In biology the word bio catylysts describes the word enzymes . Bio catylysts are nothing but enzymes which alter the rate of reaction . For ex - Pepsinogen , which is produced in the stomach of humans activated by HCl from a proenzyme called trypsin . It works in acidic medium and converts proteins into peptides and protons . Likewise there is another enzyme called Salivary amylase which is present in the saliva of humans converts starch into maltose . There is another enzyme called lipase which converts fats into fatty acids and glycerol .

The answer should be C, global warming.

Burning of fossil fuels releases gases like carbon dioxide or nitrous oxides, which are greenhouse gases. Greenhouse gases absorbs heat from the atmosphere in order to keep the Earth warm. However, due to the increased urban activity in recent years, more and more greenhouse gases are produced and released to the atmosphere and greenhouse effect is intensified. The earth is getting hotter and hotter. This effect is called global warming.

On the other hand, increased extreme weather and decreased in food supply are also some consequences of global warming, but they're not direct effects of burning of fossil fuels. In addition, the sea level right now is rising instead of falling, also due to global warming.

Therefore, your answer should be C, global warming.