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.

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

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

There is a state-of-the-art electron microscope in my laboratory.

Yuu is hanging out the laundry.

He chose a character named Sen.

Mother laid out delicious dishes on the dining table.

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