He is majoring in belles-lettres.

Proletarian literature is a type of literature that depicts the life and struggles of the working class.

Spectroscopy is an important means of investigating the properties of matter.

Taxonomy is an important tool for understanding the diversity of life.

Analytical chemistry is a science that reveals the composition and structure of substances.

He is majoring in humanities at university.

He has a deep interest in humanities.

He is majoring in philology at university.

He is immersed in the study of sensual literature.

He is learning the basics of elementary learning.