Vemana, a medieval Telugu poet and philosopher, is known for his:

The correct answer is: a) Simple and thought-provoking verses.

Vemana was a medieval Telugu poet and philosopher who is known for his simple and thought-provoking verses. His poems are often satirical and deal with social and religious issues. He is considered one of the most important Telugu poets of all time.

Option b) is incorrect because Vemana did not write epics narrating mythological stories.

Option c) is incorrect because Vemana did not write devotional poems dedicated to Lord Shiva.

Option d) is incorrect because Vemana did not write romantic poetry.