How to figure out the main idea?

goat · January 20, 2021, 5:08am

how can i find out the main idea for this one?

Anglophile · January 20, 2021, 5:41am

You are welcome to this forum,@goat!

The answer indicating the main or central idea should be the third - Waterborne diseases.

goat · January 20, 2021, 5:58am

thank you sir!
if i have more questions i can post it here right?

Torsten · January 20, 2021, 6:54am

Hi Goat, welcome to our forum. Yes, you can post more questions here.