Tbh I don't understand what u are asking
A. Your outline must come first
Depth of field is the distance between the closest and farthest objects in a photo that appears acceptably sharp. Now your camera can only focus sharply at one point. But the transition from sharp to unsharp is gradual, and the term 'acceptably sharp' is a loose one!
Answer:
the balloons will repel each other when they are close to each other because the same material has been used to charge them so showing that they have the same charge