1. The problem is to complete the sentences with words from the same word family as "biological". 2. The words given are "biology", "biologist", and "biological". 3. The first sentence: "Linda Buck is an American ⬇️ who studies the way human bodies work." - Here, the word needed is a noun describing a person who studies biology, so the correct word is "biologist". 4. The second sentence: "Buck is interested in human ⬇️ because it helps her understand how people relate to the world around them." - Here, the word needed is a noun referring to the science or field of study, so the correct word is "biology". 5. The third sentence: "One of her important achievements is discovering the ⬇️ processes that allow people to recognize 10,000 different odors." - Here, the word needed is an adjective describing the processes, so the correct word is "biological". 6. Final answers: - Linda Buck is an American **biologist** who studies the way human bodies work. - Buck is interested in human **biology** because it helps her understand how people relate to the world around them. - One of her important achievements is discovering the **biological** processes that allow people to recognize 10,000 different odors.