Question

grazing animals of the same species often group together, forming a herd. what are the benefits of herding? check all that apply. protection hydrodynamic efficiency reproduction division of labor aerodynamic efficiency foraging

Explanation:

In a herd, more animals mean better protection against predators. Also, a group can search for food (foraging) more effectively. Reproduction can be facilitated as there are more potential mates. Hydrodynamic and aerodynamic efficiency apply more to aquatic and flying groups respectively and not typical benefits of grazing - herd animals. Division of labor is not a common feature in simple grazing - animal herds.

Answer:

protection
reproduction
foraging