I think I would go for the human. For one what would happen to the animal that was saved if it's owner died? I know personally if I saved a dog or a cat I wouldn't be able to keep it, it would end up going to a shelter and who knows if it would get adopted or not. While pets are VERY special and I love mine like children, I know that if my cats died in a fire I would miss them so much it would be like a part of me died as well. But if I died in a fire my mom, dad, sister, grandparents, aunts, uncles (you get the point) would all feel like a little part of them died.

However I did want to add that after I saved the human I would go back and try to save the animal if there was enough time left.