The `ul((A))` undergoes cyclic changes during menstrual cycle while the `ul((B))` exhibits strong contraction during delivery of the baby.

Answer

To solve the question, we need to identify the two structures in the uterus based on their functions described in the question.

### Step-by-Step Solution:

1. **Identify the Structure that Undergoes Cyclic Changes During the Menstrual Cycle**:
- The menstrual cycle involves changes in the lining of the uterus, specifically the layer that prepares for potential implantation of an embryo. This layer is known as the **endometrium**.
- The endometrium thickens and sheds during the menstrual cycle, indicating its cyclical nature.

2. **Identify the Structure that Exhibits Strong Contraction During Delivery**:
- During childbirth, the uterus contracts to help push the baby out. The layer responsible for these contractions is the **myometrium**.
- The myometrium is made up of smooth muscle tissue, which allows it to contract effectively during labor.

3. **Final Answer**:
- For part (A), the answer is **endometrium** (the layer that undergoes cyclical changes during the menstrual cycle).
- For part (B), the answer is **myometrium** (the layer that exhibits strong contractions during delivery).

### Summary:
- A: Endometrium
- B: Myometrium