Question

hi guys I was logged out that's why I was not posting questions​

Answer 1

Answer:

ooooo sadd

Explanation:

brainliest please if this helped you

Answer 2

The art of filtration was known to early humans, who obtained clear water from a muddy river by scooping a hole in the sand on a river bank to a depth below the river water level. Clear water filtered by the sand would trickle into the hole. The same process on a larger scale and with refinements is commonly used to purify water for cities.