The study and tracing of lines of descent or development is called

Answer: Option C

Explanation:

The supposed communication of thoughts or ideas by means other than the known senses is called Telepathy.

The study of caves is called Spelelogy.

The branch of science concerned with earthquakes and related phenomena is called Seismology.

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 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 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 A

Explanation:

The study of effect of environment on workers is called Ergonomy.

The science of improving a human population by controlled breeding to increase the occurrence of desirable heritable characteristics is called Eugenics.

The study of heredity and the variation of inherited characteristics is called Genetics.