How to define reinforcement learning? Select the sentence that defines best this learning method.

Question

How to define reinforcement learning? Select the sentence that defines  best this learning method.

Accepted Answer

it is a paradigm and not a type of model: it can be made using a neural network, a decision tree, etc.

Accepted Answer

It enables an agent to learn in an interactive environment by trial and error using feedback from its own actions

Answer

It is used when developing a neuron network (because deep learning model doesn't learn the way machine learning one does)

Answer

It combines supervised and unsupervised learning : it was invented to enable devs to be able to use both with on one single model

Question from the Machine learning - Fundamentals test