Which of these is true about barrier islands?

A) They are made up of rocky beaches
B) they are surrounded by swamps on the most sides
C) They protect the mainland from the effect of waves on its shore
D) The mainland protects them from the effect of waves on it shore

The statement that is true about barrier islands is that "They protect the mainland from the effect of waves on its shore."

Barrier islands are described as a form of coastal areas which is usually flat or have some bumpy areas full of sand, known as a dune system.

Barrier islands are known to create substantial protection for the mainland from storm effects as they are situated near coral reefs and mangroves.

Hence, in this case, it is concluded that the correct answer is option C. "They protect the mainland from the effect of waves on its shore.

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D

Explanation:

D) The mainland protects them from the effect of waves on it shore

in 1803 the louisiana purchase took place, doubling the size of the country. by 1840 almost 7 million americans had migrated westward in hopes of securing land and being prosperous. the belief that settlers were destined to expand to the west is often referred to as manifest destiny.

explanation:

b

explanation: