In his painting virgin and child enthroned c.1310, giotto, nicknamed the "the father of renaissance painting," employed which technique to give the illusion of believable space?

Tempera

Explanation:

Tempera was the technique was used in medieval and in early Renaissance periods. There are several artists used this technique such as Giotto, Flippo Lippi, Boticelli and more. Well, tempera technique was used by Giotto in his artwork the Virgin and Child Enthroned.

pitch- the definition of pitch is as follows:

"the quality of a sound governed by the rate of vibrations producing it; the degree of highness or lowness of a tone."