Extrinsic motivation is driven by external factors , which will make people do things to gain external benefits. Thus, the scenario that exemplifies extrinsic motivation is the fact that Lacey ran into a heated shop to warm up, when the temperature suddenly dropped. What made Lacey react in that way so that he could take shelter from the weather ? An external factor: extremely cold temperature. The other examples stand for intrinsic motivation since the drive that activates a certain behaviour in those people comes from within their own selves: not feeling like answering the door; feeling guilty and confessing ; and loving animals and volunteering for rescuing them.
By explaining problems and giving solutions! this is the best fit because the other two might make sense at a first glance, but only explaining problems and solutions would be an effective way to teach people how to set up an aquarium by giving them examples of what to do and what not to do whereas the others are just him talking about his aquarium.
I would use a pencil so I can erase if i write it incorrectly or something else.
