Answer:
Option 4 - Calcium
Step-by-step explanation:
The divalent cation called calcium is needed to provide additional support to the bone matrix.
Calcium is considered one of the most important components in bone development. It helps in the formation as well as maintenance of bone. During the modeling and remodeling process of bones, calcium facilitates the formation of semi-hard new tissues which leads to the formation of new bone which is very hard.
Due to this reason, calcium is needed to create extra bone matrix support.