Question

which word in the poem tells that rainwater needs to be collected for later use

Answer 1

rainwater hervesting word in the poem tells that rainwater needs to be collected for later use ....... i hope it helps you

Answer 2

The words that tell rainwater needed to be collected for use later is rainwater harvesting.  

Rainwater harvesting is a collection of rainwater normally under the basement of the house of in lakes and ponds.

As the scarcity of water is increasing and the groundwater level going down, it is rainwater that needs to be harvested and used for many beneficial purposes.