Answer: Bobby, steak, wooden stool, potatoes, and sour cream.
Explanation:
A biotic factor is a living being which interact with the other living beings and the surrounding non-living physical environment. Here, in the question the elements which are prepared from a living source are to be mentioned.
Among the options given, Bobby could be a name of the living being which can be a human, cat, dog or any other pet. Steak is a meat which includes the bone. It comes from the flesh of fish, pork, bison, camel, horse, goat and other animals. Wooden stool also comes from a biotic source that is hard wooden stem of trees like Teak and others. Potato is a vegetable which is a plant product, may contain living cells like other living beings. Hence, it is also a living being. Sour cream may contain sour vegetables like tomato, ginger, lemon and others which are also plant products.
