Explanation:

- Option 1: Node

- Correct Answer: The node is the specific part of a plant stem where leaves are attached. It plays a crucial role in the growth and development of plants as it also gives rise to branches and sometimes flowers.

- Option 2: Tuber

- A tuber is a thickened part of a stem, usually underground (like potatoes), serving as a storage organ. Tubers store nutrients and energy for the plant and can give rise to new plants, but they are not the points where leaves emerge.

- Option 3: Carpel

- Carpels are the female reproductive structures of a flower, consisting of an ovary, a style, and a stigma. This term is relevant to the reproductive part of plants, not the vegetative growth where leaves are attached.

- Option 4: Bud

- A bud is an undeveloped or embryonic shoot and normally occurs in the axil of a leaf or at the tip of a stem. Buds may develop into flowers, leaves, or shoots.

Highlighted Correct Answer: Option 1: Node