Hello Abhilash,

• PSYCHOLOGY- Psychology is basically the study of human mind and behavior. It is a broad field the focuses on study of human thought,  behaviour, development, personality, emotion, motivation etc. It also helps in understanding an individual's actions as well as that of others.

• HEALTH PSYCHOLOGY- It is the study of psychological and behavioral processes in health, illness and healthcare. It focuses around understanding how psychological,  cultural and behavioral factors contribute to physical health and illness.

I hope it helps

Thank you

Geology - Geology is the study of the Earth's history, its composition, and Earth's processes, including its future. It is Earth Science which specializes in the solid part of the Earth such as rocks, their composition, and the processes that have affected them over time.

Geography- Geography is a field of study that deals with the physical features of the earth, including the seas, mountains and the countries of the world. A student of Geography therefore studies how the surface of the earth is differentiated, how factors such as elevation, climate, soil, vegetation, land use, industries, population and countries interact with each other.