me ajudem pfvr sem gracinha se não deleto sua resposta pfvr me ajudem

Resposta:
a)a RIVERS is a watercourse, usually freshwater, that flows by gravity toward on ocean, a lake, a sea, or another RIVERS.
b)OCEANS is a large amount of salt water that covers almost three quarters of the Earth's surface, is divided by continents and large archipelagos.
c) a LAKES is a natural depression on the Earth's surface that permanently contains a variable amount of water.
d)in geology is considered AQUIFERS all that water occupies all the empty spaces of a geological formation,the so-called FRESHWATER groundwater os formed by surplus rainwater.
Espero ter ajudado!!