What do scientists in the field of systematics accomplish?
discover new fossil sites
organize and classify organisms
name new species
communicate among field biologists

organize and classify organisms

Explanation:

Systematics is the area of biology that is concerned with organizing, understanding and classifying living things. It mainly studies the diversity relationship, for example, species C is more related to species D than it is to B, defined as sister groups.  

Systematic aims to show the diversity within the genre, also to describe the biodiversity, which is part of the taxonomy, to order the species and biodiversity, underlying this systematics. This science is concerned with building classes, classifying, on which we can make generalizations. For this reason, we can conclude that scientists in the field of systematics work to organize and classify organisms.