Which of the following is the height of most lowercase letters called

The imaginary horizontal line that marks the top edge of the lowercase letters is the Meanline. The x-height (1) is the height of the lowercase x. In other words it is the distance between the baseline and the meanline. The main vertical or diagonal stroke in a letterform is known as the Stem (7).

its the x height

sunflower

explanation:

the answer is   as follows

d

c

b

a

d