The branch of science that deals with the study of trees and shrubs is called:

A. Agrology

B. Xylology

C. Forestry

D. Agriculture

Dendrology, also called forest dendrology or xylology, study of the characteristics of trees, shrubs, lianas, and other woody plants. Dendrology is generally considered to be a branch of systematic botany or forestry and is primarily concerned with the taxonomy of woody species.