“animal.” The Hebrew is more literally “living thing.”
“living soul.” The Hebrew word “soul” is nephesh (#05315 נֶפֶשׁ), and nephesh is the life force that animates humans and animals, and it is also used of “individuals.” Here it refers specifically to the life force in humans and animals. See commentary on Genesis 1:21.
[For more information on soul, see Appendix 7: “Usages of “Soul.’”]