<span>Biotic factors are the living components of an
ecosystem. They are sorted into three groups: producers or autotrophs,
consumers or heterotrophs, and decomposers or detritivores.</span>
Answer: 11.5, but it would be D because it's the closet
Explanation:
Since it has 4 protons, it must have an atomic number of 4. (That makes it beryllium.)
Since it has a 4 protons and 5 neutrons, it has a mass number of 9.
