The subject of a sentence is the person, place, thing, or idea that is performing the action.
Answer:
longitudinal
Explanation:
Longitudinal study: In psychological research, the term "longitudinal study" is also referred as "panel study" or "longitudinal survey", and is described as a research or study design that encompasses distinct repeated observations of the same participants or variables by the researcher, investigator, or experimenter for either a long or short period in time.
In the question above, the given statement signifies that the professor conducted a longitudinal study.
All of the above so d is the answer to the question
Mining is where ppl go down in caves/ different ares to extract metal or valuable ores, it involves them using pickaxes or modern technology to get the ores out. its dangerous to the lungs because dust and/or rocks can harm your breathing habits/ how well you breathe/ if you can breathe well or not.
