Which kind of exercise targets muscle cells instead of the cardiovascular system to meet the rapid demand for energy?

The correct answer is anaerobic exercises. Anaerobic exercises is an intensely done activity, wherein the body’s call for oxygen goes beyond the oxygen source accessible within the body. Anaerobic exercises feeds on the energy sources that are stored in the muscles of the body, which is why it is the exercise that targets muscle cells for maximum demand of energy.

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.