1. Kiss, Kissing, About to, Couple
2. Open, Walking, Enter, Entering, Shopping, Store
3. Owls, Three, Fall, No more summer, Summer's end, School, Back, Books, Tree, Limb
1. It's not WHAT they're doing but where the pic comes from.
2. You're close. It's a preposition.
3. You almost have it --be more specific.