Hurry

why is beach nourishment considered mostly a short-term strategy for fighting beach erosion?
it requires heavy machinery.
it takes a long time to find the materials.
it must be repeated every 5 to 7 years.
it is expensive.

Option C

Explanation:

Beach Nourishment is a process of preventing coastal erosion through addition of sediments on beach. This is not a long lasting solution and hence beach requires re-nourishment after every 2-3 years or periodically. However, finding material for re nourishment is not at all a challenge. Sand from near by areas and be dredged and pumped onto the beach. This makes it an expensive exercises.

Hence, option C is correct