He is an expert in speleology and is exploring caves around the world.

They (referring to women or girls) are my best friends.

The moonlight was dim, and I couldn't see anything.

He pulled out his hair due to stress.

The cat's fur is on the sofa.

The symbol of his ferociousness is his fierce tiger tattoo.

He was looking closely at the painting.

He was born blind.

He is an expert in computer networks.

I agree with your proposal.