Atoll. An atoll is a type of coral reef, shaped like a ring, that surrounds a lagoon.
Physical Features are: not man-made objects eg). Mountains, rivers ETC.Human Features are: Man-made objects eg). Buildings, Cities ETC.Hope this helps :)
is an object which has (contains or features) the smaller object
Small clusters of islands, generally they have little elevation above sea-level.
An island of coral that encircles a lagoon partly or completely.