Answer:
Option (D)
Explanation:
The kinetic energy of an object refers to the energy that is gained because of the motion of the object. In simple words, it can also be considered as the amount of work required to accelerate a body from rest to a certain velocity. Due to this, the body attains a kinetic energy.
Mathematically, Kinetic energy is given by-
K.E= 1/2mv²
where, K.E is Kinetic energy
m=mass of the object
v=velocity of the object.
Thus, when the marine animals swims in the oceans, their muscles performs some work. As a result of which the energy obtained by the food changes into Kinetic energy due to which they are able to swim and their body is in motion.
Hence, the correct answer is option (D).
