Using punctuation marks correctly is important for understanding sentences.

What is this solid made of?

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

The government has announced a new policy to support the lives of the poor.

The aquifer in this area provides a very abundant water source.

The opinions of the non-partisan layer greatly affect the election results.

The lifestyle of the super-rich is so luxurious that ordinary people can't even imagine it.

His art style is unique, it's neither fish nor fowl.

His poem depicts a world of nothingness.

The study of organic compounds is an important field in chemistry.