Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to care for a crested gecko [title] Set up a large terrarium. [step] Crested geckos are arboreal, meaning they live in trees, so make sure to get a vertical terrarium. Cresties will love having some space.

Ending1: Make sure to select a gecko based on age. [title] Try to keep one or two gallon aquariums out. Ending2: If you're starting out with a baby gecko, look for a 10 gallon vertical glass terrarium at a pet store. If you have an adult gecko (or once your baby grows up), get a 20 gallon one. Ending3: [title] Take the gecko to the vet regularly. [step] If possible, pick a good size tank and ensure it is large enough to keep the gecko safely in. Ending4: Make sure that the terrarium is big enough so that it's comfortable for your gecko. [substeps] Bearded geckos are extremely lucky if they have a wide variety of genital organs.

Answer format: ending1/ending2/ending3/ending4