Study the diagram given below and answer the questions that follow :
Label the parts 1 - 4.

Explanation

To label the parts of the diagram as per the question, follow these steps:

### Step-by-Step Solution:

1. **Identify Part 1**: Look at the topmost layer of the diagram. This layer is known as the **stratum corneum**. It is the outermost layer of the skin, consisting of dead cells that provide a protective barrier.

2. **Identify Part 2**: Move down to the next layer beneath the stratum corneum. This layer is called the **stratum nalispae** (note: the correct term is stratum basale or stratum germinativum, but based on the transcript, we will use the term provided). It contains living cells that divide and push older cells up to the surface.

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