What energy transformation occurs as the rabbit eats the grass? A.
Chemical energy in the grass is transformed into thermal energy in the rabbit.
B.
Electrical energy in the grass is transformed into thermal energy in the rabbit.
C.
Mechanical energy in the rabbit is transformed into electrical energy in the grass.
D.
Thermal energy in the rabbit is transformed into mechanical energy in the grass.

dynamic equilibrium is the answer.

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.