Dưới đây là những lỗi sai trong các câu ở phần III:

1. **Sentence 1:** "Everyone can play an important role by always doing their best to help their families flourish."
**Correction:** "flourish" (A)

2. **Sentence 2:** "Each family member need to develop certain traits and skills and then practice being a strong and supportive member of the family."
**Correction:** "needs" (B)

3. **Sentence 3:** "There are many different ways that family members show their love for one another."
**Correction:** "one another" (D)

4. **Sentence 4:** "People feel secure when they know that their physical needs are being met and that they are protected and safe from harm."
**Correction:** "met" (C)

5. **Sentence 5:** "Of all the billions of people in the world, no two are exactly alike."
**Correction:** "alike" (D)

Hy vọng những sửa lỗi này giúp ích cho bạn!