The main difference between islamic art and both egyptian and greek art is its
a. use of people and animals to honor deity.
b. avoidance of figural imagery and use of calligraphy as an alternative.
c. interest in religion and the afterlife.
d. use of natural materials and methods of creating art.

I believe the answer is: avoidance of figural imagery and use of calligraphy as an alternative.

In Egyptian and Greek , most of its art consist some sort of figural imagery. This could be seen in many wall paintings or relief in their ancient buildings.

For islamic nations, the use of Calligraphy is more popular compared to figural imagery since depicted the God in picture is considered as a Sin for muslims.

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.