Question

a biologist counts the number of zebras in a population each year, and notices an increase in the zebra population which describes the biologists actions?
graphing
inference
observation
interacting

Explanation:

The biologist is counting the zebra population each year and noticing the increase, which is the act of carefully watching and recording phenomena (the zebra population change). Graphing would involve creating a graph, inference is drawing a conclusion beyond the data, and interacting is engaging with the zebras. Observation matches the action of counting and noticing changes.

Answer:

C. observation