we can rule out D immediatley as it makes no since. honestly i think it is C.
Answer:
D. Longshore currents
Explanation:
Longshore currents are characterized as the sediment transport that occurs in the surf zone, due to the oblique incidence of the waves, along the beach. A current develops between the beach and the surf zone parallel to the coast, normally between 0.3 and 1 m / s. It is this process that is responsible for accumulating and removing sand that results in displacement of barrier islands.
Answer: Correct answer would be .. A
Explanation: because is the genetic material of all living organism and also viruses.
The correct answer is option A, thymus gland
Reason -
The thymus gland is responsible for producing T-cell for the immune system. It is usually active till puberty and then it is replaced as it shrinks down. Though this gland has a short life but it plays a major role in developing the immunity system. For instance if someone has born without a thymus gland , then the person’s body will never be able to produce T –cell or thymosin which is very essential for the immunity system development.