Apart from muscles contracting, what other types of activities has your body done in the past 24 hours that require energy? Complete the list below.

Digestion, excretion and transportation of substances.

Explanation:

Chemical reactions such as breakdown of food, cleaning of blood and absorption of nutrients and digestion are the activities that our body done with the use of energy. Digestion of food needs energy for the breakdown of food with the help of several enzymes. Transportation of waste materials and other substances also needs energy. Our cells absorb nutrients with the help of energy molecules through active transport.

the answer is d. chordata