Question

the electric field generated by an ion is strongest near the ion. in other words, as an object gets closer to an ion, the object will feel a stronger electric force from the ion. this model represents the electric field around a positive ion. select the charge that would feel the strongest force.

Explanation:

Step1: Recall Electric Field Strength

The electric field strength (and thus the electric force on a charge) is strongest closer to the source charge (the positive ion here).

Step2: Compare Distances of Green Charges

Among the green positive charges, the one closest to the red positive ion (source charge) will feel the strongest force. Visually, the green charge below and to the left of the red ion is the closest.

Answer:

The green positive charge (the one) closest to the red positive ion (the lower - left green + charge relative to the red + ion)