Answer:
1, 2, and 4 (top left, top right, and bottom left)
Step-by-step explanation:
Ignoring the "interesting" visuals (mildly questionable compared to what atoms actually look like), we can see 5 atoms in total.
The first one (top left) has 1 electron orbiting 2 protons (red) and 3 neutrons (yellow)
The second one (top right) has 1 electron, 2 protons, and 2 neutrons
The third one (middle) has 1 electron, 1 proton, and 1 neutron
The fourth (bottom left) has 1 electron, 2 protons, and 1 neutron
The fifth (bottom right) has 2 electrons, 3 protons, and 2 neutrons
What makes different elements different elements? Well, it's the number of protons. Thus, the if an atom has the same number of protons, they are of the same element. The first one, the second one, and the fourth one all have 2 protons exactly, and thus would be considered the same element. (specifically, it would be Helium!)