Amarine scientist observes that photosynthetic organisms tend to populate shallower ocean depths. she concludes that photosynthetic organisms can only live in areas of low pressure. why is this an invalid scientific conclusion?

the data she collected were not compared to those collected at other sites.
the data she collected was inaccurate.
the data she collected was from a laboratory and not in natural conditions.
the data she collected was relative and not absolute.