What type of growth widens the plant and produces wood?

a. secondary growth

b. primary growth

a. Secondary growth

Explanation:

Plants have two types of growth: primary and secondary. Primary growth is responsible for the increase in the length of the plant by cell division in the stem and in roots in the vertical plane. On the other hand, secondary growth occurs in stems in the horizontal plane, this produces an increase in the width of the plant, and it generates wood by the xylem tissue.