(a) Economic importance of oceans to man include:
(i) Oceans serve as a means of transportation and communication
(ii) They serve as sources of food, e.g fish, crayfish, etc.
(iii) Oceans, e.g continental shelf provide minerals like petroleum and natural gas
(iv) Oceans provide employment to many people e.g fishermen, sailors etc
(v) Extraction of both domestic and industrial salts
(b) One warm current in the North Atlantic Ocean is Floride current.
Factors responsible for its movement include:
(i) Planetary winds. These winds by their nature blow across oceans resulting in the movement of water
(ii) The rotation of the earth
(iii) Differences in temperature
(iv) The shape of the land masses
(v) Salinity of the water