I think the answer is mutualism.
because mutualism means that the two species benefit each other.
0.295 * 203 = 53.885
0.705 * 205 = 144.525
53.885 + 144.525 = 204.41
The relative atomic mass of Thallium is 204.41
pretty sure its B thank me later
The protons inside an atoms nucleus help bind the nucleus together. They also attract the negatively charged electons