what are the 5 main coastal features?

Answer 1

Check this informative site.

http://visual.merriam-webster.com/earth/geology/common-coastal-features/common-coastal-features.php

Answer 2

These two sites will be of help.

http://uk.encarta.msn.com/encyclopedia_781532717_3/Coastal_Features.html

http://en.wikipedia.org/wiki/Coast#Coastal_landforms