Answer:
Geographers study how people interact with their environment
Step-by-step explanation:
We use present tense for recurrent or consistent actions over a time period, for actualities, for routines and things that generally and universally true.
People interact with the environment is the overall truth. If they don’t then it means that they are dead. So use of present tense is the accurate in this sentence.
Present tense has four facets and one which is simple present. The verb gets modified as per the tense and the subject.