Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to stop cats from peeing on the front porch [title] Remove resources. [step] Remove food, water and other things that could be highly prized by visiting cats. This reduces the " value " of the porch and makes it less worth it to stake a territorial claim.

Ending1: [title] Ensure your yard is free of outside litter. [step] Good places to put up litter include in garages, areas fenced in, around porches, under heavy furniture, etc. Ending2: [substeps] This removes objects such as sturdy clothes boxes, stuffed animals, toys, rugs, furniture or such. Domestic cats will generally prefer furniture if kept in only a certain size. Ending3: [title] Use a motion-operated compressed air canister. [step] An ideal deterrent is a canister of compressed air that is activated by a motion sensor. Ending4: [title] Make sure your cat has received lots of exercise. [step] When cats have been at this place for a while, they tend to be healthier and weaker.

Answer format: ending1/ending2/ending3/ending4