Ionic bonds bond ions together

because they connect in order for one to transfer their electrons to the other.
because they connect in order for one to transfer their electrons to the other.
through their electric attraction to each other due to their opposite electrical charges.
through their electric attraction to each other due to their opposite electrical charges.
through their electric attraction to each other due to their equal electrical charges.
through their electric attraction to each other due to their equal electrical charges.
because they share electrons with each other, pulling them together.
because they share electrons with each other, pulling them together.

The correct answer is: through their electric attraction to each other due to their opposite electrical charges.