The answer is be because that's how it works in real life to most people
The study found that infants crossed the cliff when their mothers encouraged them to do so.
In this 1960 study by psychologists Eleanor J. Gibson and Richard D. Walk, infants aged 6 to 14 months are placed at one end of the runway and their parent stands at the other end of the plexiglas surface. The idea is to evaluate the child's perception of height and depth: if they perceived the visual (simulated) cliff, and if they became scared of it, they would be reluctant to crawl over to their parent.
An overwhelming majority (27 out of 36 children tested) crossed the surface, motivated by their parent's stimulus.
Human behaviour is a condition that is influenced by many factors, which includes culture and environment. In many cases, culture and environment lead to irresponsible littering as they presented the easy road - the irresponsible one - as the preferable one, instead of pursuing a more difficult and responsible behaviour.
The correct answer is reaction formation
Reactive formation is a defense mechanism that occurs when a person feels a desire to do or say something but says the opposite. Reactive formation appears as a defense against a feared social punishment. If I fear that I will be criticized for anything, I very visibly act in a way that shows that I am personally out of the way of the feared position.
A common pattern in reactive formation is where a person uses "excessive behavior", for example, using exaggerated sympathy when the person is really feeling hostile.