What is the relationship between water, river, river, river, ocean and sea? What is the difference? What is the state of life?

Water flows into rivers, rivers, rivers, oceans,

This is the relationship between many a mickle makes a mickle, from a little water to the sea.

It's all water, but the scale is different. The bigger the better.

See the growth of life, grow up from childhood and accumulate more knowledge.