hey friend it is Observational study because it says that her records hourly temperature over the course of several years in order to make a decision(variations) or to analyse his experiments. ;)
Answer: B) Observational Study
<u>Step-by-step explanation:</u>
A) Experiment is when the researcher influences the results in some manner
B) Observational Study is when the researcher observes or measures the data but does not influence the results.
C) Survey is when the researches collects data from a sample group to evaluate data about a larger group.
Answer:
.
Step-by-step explanation:
