The depressed cowry lives quietly at the bottom of the sea.

He always proactively suggests new ideas.

He likes to take a walk in the park at dusk.

He is undergoing training for extravehicular activity.

He engaged in an extravehicular activity from the spaceship.

There was a spot on his shirt.

I have been to Ahmedabad.

He solved the problem in a scientific way.

This reaction occurs through a chemical process.

He is good at tactical thinking.