Esoteric buddhism art was influenced by polytheistic religions. what was the main characteristic of esoteric buddhism art?

I believe the correct answer is: Mandara.

     East Asian Esoteric Buddhism, founded in the early 9th century (Heian period) and referred to as mikkyō (secret teaching) in Japan, was influenced by polytheistic religions, from which the main characteristic was mandara/mandala. Mandara is the way of spiritually and ritually representing the universe through chart or geometric pattern.

earliest

neumes above text

neumes

colored lines

neumes

4-line staff

f, c, or g clef

notes on 5-line staff with clef

mensuration (longas and breves)

time signature (perfect or half circle)

most recent

notes on 5-line staff

modern clefs

modern note values (whole, half, quarter, and so on)

modern time signature

italian words and abbreviations for dynamics and tempo

staccato, slurs, and so on