Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to help stop cruelty towards animals [title] Avoid products that are tested on animals. [step] A variety of products, from cosmetics to pharmaceutical drugs, are tested on animals. Animal rights advocates disagree with the use of such products for a variety of reasons.

Ending1: Testing causes painful physical side effects for animals, lab conditions are often cramped and unpleasant, and animals are often killed or die unintentionally during the process. Know what products are likely to be tested on animals and avoid such products. Ending2: However, research shows that animal rights organizations make two primary materials good for animals. However, one important material is that animals are protective, creative and free from electrical devices. Ending3: Ask for or buy any products that seem to be on a poor shelf or in different temperatures. [substeps] Natural oils, like coconut oil, olive oil, and sunflower oil are also labeled as " human " products and may have medicinal or scientific implications. Ending4: There are many flavors that are tested, including : [substeps] Some yeast, which contains preservatives, free from any ones that are contributing to a dog's species. These are used to regulate the amount of yeast.

Answer format: ending1/ending2/ending3/ending4