The outer tissue of cambium develops in to:

Explanation

The cambium is a layer of actively dividing cells in plants that contributes to secondary growth by producing new cells. On its outer side, the cambium generates phloem, which is essential for transporting sugars and nutrients throughout the plant. In contrast, xylem forms on the inner side of the cambium and is responsible for water and mineral transport. The cortex is a separate tissue, formed from the primary meristem, and the epidermis originates from the apical meristem, not the cambium.