Which definition describes data?

the act of recognizing an occurrence using the senses
the information gathered from a scientific investigation
the part of an experiment used to compare results
the factor that is changed in a scientific investigation

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

density and pressure