Abiologist counts the number of zebras in a population each year and notices an increase in the zebra population. which describes the biologist’s actions?
experimentation
inference
observation
interacting

The correct answer for above statement is:

observation

Explanation:

Observation is the act or method of accurately watching someone or something.

Observation is the active appropriation of information from a primary source. In living beings, observation engages the senses. In science, observation can also include the recording of data via the use of scientific instruments. The term may also refer to any data accumulated during the scientific action.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.