Where does the growth of plants occur.

the tips of the steams and roots, also known as an apices

The growth in plants can occur in or as the stems and including the roots lengthens or grows. Thus, some plants and including the ones that are woody, Which can increase in thickness during their life span. The increase causes in length or the growth of the shoot and of course the root., which is mostly referred as primary growth. This is the result of a cell division in the shoot apical meristem.

b would be the right answer