$(a)$ Sieve tube : It is located in phloem tissue.It's function is to transport synthesized food into whole plant body.

$(b)$ Interfascicular cambium : It's function is to make secondary growth in dicot stem and root. It is a type of secondary meristematic tissue located between vascular bundles.

$(c)$ Collenchyma : It's function is to provide support to growing of tender parts of the plants. Angular thickening is seen at the corners of cells.

$(d)$  Aerenchyma: It provides buyoncy in aquatic plants.It is a special type of parenchyma. That contains large air spaces.