The study of duration of life is called

Answer: Option C

Explanation:

The use or study of images or symbols in visual arts is called Iconography.

Literature dealing with saints is called Hagiology.

The treatment of illness through the use of water, either internally or through external means such as steam baths is called Hydropathy.

Answer: Option A

Explanation:

The study of sound is called Acoustics.
The science or art of flight is called Aeronautics.
The philosophy of fine arts Aesthetics.
The science of soil management is called Agronomy.

Answer: Option B

Explanation:

The study of relation of animals and plants to their surroundings, animate and inanimate is called Ecology.

The study of insects is called Entomology.

The study of inscriptions is called Epigraphy.

Answer: Option D

Explanation:

The study of bacteria is called Bacteriology.

The study of the movements and relative positions of celestial bodies interpreted as having an influence on human affairs is called Astrology.

Cultivation of trees and vegetables is called Arboriculture.

Answer: Option C

Explanation:

The art of beautiful handwriting is called Calligraphy.

The art of making objects from clay is called Ceramics.

The study of historical records to establish the dates of past events is called Chronology.