The correct options are
A Tides are caused due to the gravity of sun and moon.
B Tides help humans in fishing and navigation.
C Spring and neap tide are two types of tides.
Tides are periodic movements of ocean water due to the gravity of moon and sun. The gravitational pull of the moon is responsible for the formation of tides. The two tides formed are the spring tide and the neap tide. Tides are very useful to man as it helps in navigation and fishing.