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

Answer: Option B

Explanation:

he collection and study of postage stamps is called Philately.

The branch of knowledge that deals with the structure, historical development, and relationships of a language or languages is called Philology.

The study and classification of speech sounds is called Phonetics.

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.

Answer: Option C

Explanation:

The study of human races is called Ethnology.

The study of animal behaviour is called Ethology.

The study of origin and history of words is called Etymology.

Answer: Option D

Explanation:

The study of ancient writing systems and the deciphering and dating of historical manuscripts is called Paleography.

A person's facial features or expression, esp. when regarded as indicative of character or ethnic origin is called Physiognomy.

The production of silk and the rearing of silkworms for this purpose is called Sericulture.

Answer: Option D

Explanation:

The study of finger prints for the purpose of identification is called Dactylography.

The branch of biology concerned with the structure and function of plant and animal cells is called Cytology.

The branch of physics dealing with the production and effects of very low temperatures is called Cryogenics.