State true (T) or false (F).
The sebaceous glands become less active during puberty.

Answer

To determine whether the statement "The sebaceous glands become less active during puberty" is true or false, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Role of Sebaceous Glands**:
- Sebaceous glands are exocrine glands in the skin that produce an oily substance called sebum.

2. **Identify the Changes During Puberty**:
- During puberty, the body undergoes various hormonal changes. These changes affect the activity of different glands, including sebaceous glands.

3. **Analyze the Activity of Sebaceous Glands During Puberty**:
- It is known that during puberty, sebaceous glands become more active rather than less active. This increased activity leads to the production of more sebum.

4. **Conclude the Statement**:
- Since the sebaceous glands are more active during puberty, the statement "The sebaceous glands become less active during puberty" is incorrect.

5. **Final Answer**:
- Therefore, the answer to the question is False (F).