Which contraceptive method also prevent from STD and AIDS.

Answer

### Step-by-Step Solution:

1. **Understanding Contraceptive Methods**: Begin by recognizing the various contraceptive methods available, which include hormonal methods (like pills), surgical methods (like sterilization), and barrier methods.

2. **Identifying the Purpose of Contraceptives**: Contraceptives are primarily used to prevent pregnancy. However, some methods also provide protection against sexually transmitted diseases (STDs) and HIV/AIDS.

3. **Focusing on Barrier Methods**: Among the different methods, barrier methods are specifically designed to prevent both pregnancy and the transmission of STDs.

4. **Exploring Condoms as a Barrier Method**: The most common barrier method is the condom. Condoms are sheath-shaped barriers that are used during sexual intercourse.

5. **Mechanism of Action**: Condoms work by creating a physical barrier that prevents the exchange of bodily fluids (such as semen, vaginal fluids, or blood) during sexual activity. This barrier effectively reduces the risk of STDs, including HIV/AIDS.

6. **Conclusion**: Therefore, the contraceptive method that also prevents STDs and AIDS is the **condom**, which is a type of barrier method.