Answer:
Operant Conditioning
Explanation:
Operant Conditioning -
It is one of the learning method , which occurs by some punishments and rewards for a particular task or behavior , is referred to as operant conditioning.
As, from the scenario of the question,
Millie opted to get groceries from online platform , rather than offline , as it wait a lot of her time , while purchasing groceries from the supermarket.
Therefore ,
Millie demonstrates , operant conditioning.
