Does backpropagaion learning is based on gradient descent along

does-backpropagaion-learning-is-based-on-gradient-descent-along

Does backpropagaion learning is based on gradient descent along error surface?

A. yes

B. no

C. cannot be said

D. it depends on gradient descent but not error surface

The question was asked in an online quiz.

My enquiry is from Backpropagation Algorithm topic in chapter Feedforward Neural Networks of Neural Networks

Right choice is A. yes

Explanation: Weight adjustment is proportional to negative gradient of error with respect to weight.