In tropical regions, coasts can be modified by biological ...

[hbsimmons88]

In tropical regions, coasts can be modified by biological activity such as the construction of ____________
  ____________, which are linear masses of calcium carbonate assembled from and by multitudes of coral animals Fill in the blank(s) with the appropriate word(s).

Question 2

____________ are formed as a result of sediments washing off the land that have built out the coast. These sediments
  accumulate on a broad continental shelf. Fill in the blank(s) with the appropriate word(s).

[jjorrostieta]

Answer to Question 1

coral reefs

Answer to Question 2

Deltas

[hbsimmons88]

TYSM

[yeungji]

Thanks for the timely response, appreciate it