Intercalary meristems are specialized regions of growth found in plants. They are responsible for elongating the stem or the axis of the plant.

Looking at the options provided, option 1 mentions the node. Nodes are the points where leaves, buds, and branches originate from the stem. Intercalary meristems are not typically found at nodes.

Option 2 mentions the lateral bud. Lateral buds are located on the sides of the stem and are responsible for producing new branches or shoots. Intercalary meristems are not typically found in lateral buds.

Option 3 mentions the terminal bud. Terminal buds are located at the ends of the stems and are responsible for the upward growth of the plant. Intercalary meristems are not typically found in terminal buds.

Option 4 mentions the internode. The internode is the portion of the stem between two nodes. Intercalary meristems are commonly found within the internodes, contributing to the elongation of the stem.

Therefore, the correct answer is option 4.

Note: It is important to understand that while intercalary meristems are commonly found in the internodes, they can also be found in other locations such as the base of leaves in some plants.