Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to make a goldfish more interesting [title] Examine your goldfish's behavior. [step] Examine the simple things that your goldfish does and how they react to different types of stimuli. Take notice if they get excited when you get their food, where they like to swim, and what kind of behavior they naturally exhibit.

Ending1: [substeps] If you discover that your goldfish is messy, don't expect them to act bubbly, energetic, or affectionate if you feed them. Expect them to remain messy and willful because they enjoy having their food all around them. Ending2: [substeps] Goldfish tend to naturally become more talkative and interested when they have food available. They may not willingly be fed with their food anyway, but they are more willing to interact with other fish. Ending3: This will not only make your fish more enjoyable, but it will also help you understand it when you start to train it. [substeps] Potential tricks include swimming in a circle, swimming under a rock, or swimming backward. Ending4: [substeps] Think about your goldfish's interactions with other goldfish in the aquarium. How do they respond to different things, including visiting different fish, swimming, and being active with them? [title] Determine if your goldfish can stand on their own.

Answer format: ending1/ending2/ending3/ending4