Water dispersal of Coconut is not efficient because
A. It is restricted
B. Coconut fruit decays within a couple of days
C. The fruit cannot remain afloat for than
D. The statement is incorrect

Hint: Biological dispersal involves the movement of an organism from its birth population to another population or area where it can reproduce. This includes dispersal of pollens, seeds, fungi or organisms.

Complete answer: The dispersal or an organism, seed, pollen, etc. is of two types:
Active dispersal- It involves those organisms that can disperse on their own or have energy for their movement.
Passive dispersal- It involves the use of kinetic energy of the environment for movement. It may involve the use of biotic factors like animals or abiotic factors like wind, water, etc.
Hydrochory or water dispersal includes dispersal using sea, river, stream or rain water for the dispersal of seeds, ferns, zooplanktons or phytoplanktons.
Seed dispersal is the movement of seed away from the parent plant individually or collectively. It occurs mainly by five modes-water, animals, wind, gravity and ballistic methods.
Seeds of light and buoyant fruit can only be dispersed through water as they will be able to float. Coconuts are huge and heavy fruits but have a fibrous outer covering that helps them float on water and reach land where they germinate. So the coconut is adapted for dispersal through water and the coconut that falls from the coconut palm, it will float for some time. So water dispersal of coconut is efficient and the given statement is not true.
So, the correct answer is “Option D”.

Note: Seed dispersal is important for the ecology and evolution of plants. It plays an important role in maintaining the species diversity of various flowering plants at different geographical locations.