A sea anemone makes an ideal home for a clownfish. Its poisonous tentacles provide protection from predators and a clownfish makes its meals from the anemone's leftovers. A clownfish can help an anemone catch its prey by luring other fish toward over so that the anemone can catch them. What type of symbiotic relationship do the clownfish and the sea anemone have? A. mutualism
B. commensalism
C. parasitism
D. consumerism

Mutualism

Explanation:

They both benefit from the relationship

your picture is not part of the scientific method.

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.