What is this solid made of?

There are sediments at the bottom of this lake that have accumulated over centuries.

He is a person of strong vanity who reads self-improvement books.

He traveled around the world in search of the elixir of life.

Every morning, I sprinkle water on the flowers in my garden.

Every morning, I sprinkle water in the garden.

The water pipe is broken and water is leaking.

This river becomes brackish water where it mixes with the sea.

We should strive to protect water resources.

This skin toner is indispensable in my skincare routine.