Final answer:
Sentences 1 and 4 provide the best evidence that cells protect the body by highlighting the roles of stem cells in tissue repair and white blood cells in immune defense.
Step-by-step explanation:
The question is asking which two sentences provide the best evidence to support the idea that cells protect the body. To answer your question, the sentences that best support this idea are sentences 1 and 4. Sentence 1 states that stem cells divide and replicate to renew and repair tissue, which is a protective function in maintaining the integrity of body tissues. Sentence 4 describes how white blood cells play a critical role in the immune system by destroying pathogens and offering protection against disease. Together, these sentences highlight the protective roles of cells in ongoing tissue maintenance and immune defense.