What is the term for collecting information about the physical world via the senses or a scientific instrument?

A. Experiment

B. Phenomenon

C. Theory

D. Observation

The answer is A

an experiment is a scientific way of gathering data about the world around us using the scientific method and the proper tools to do so

a phenomenon is something that happens that we may not necessarily explain

a theory is something that we use to explain the world around us that we can't prove 100% but is accepted as the truth in most cases until proven otherwise

and an observation can imply you are just watching something happen and no scientific studies or uses apply