Explanation:

In the southern parts of India, the Amaravati School developed on the banks of Krishna river, under the patronage of the Satvahana rulers. While the other two schools focused on single images, Amaravati School put more emphasis on the use of dynamic images or narrative art.
The Mathura School flourished on the banks of the river Yamuna in the period between 1st and 3rd centuries B.C. The sculptures of the Mathura School were influenced by the stories and imageries of all three religions of the time – Buddhism, Hinduism and Jainism. The images were modelled on the earlier Yaksha images found during the Mauryan period. The Mathura School showed a striking use of symbolism in the images. The Hindu Gods were represented using their avayudhas.