What are the ways in which we can save water or use water carefully to avoid wastage?

Fill in the blank with a suitable word:

Animals need water to _____ (survive/die)

Give reasons for the following.

Leaking taps and pipes should be repaired.

Choose the right word and answer the following.

Water that seeps into the ground is called _____. (groundwater/surface water)

$70\%$ of our body is made of _____.

Write two ways to save water.