(Question)
Bigger stars produce more energy, so their surfaces are hotter.  Jan is comparing stars, specifically a small star and the larger Sun. Given the size of each, Jan can tell that the Sun puts out heat that is lesser or greater?
(Answer)
lesser


(Question)
Higher frequency waves have greater energy.  A wave with a low frequency has more or less energy than a wave with a high frequency?
(Answer)
less


(Question)
Less massive objects also have less gravity than more massive objects.  Sue weighs 50kg while Tom weighs 100kg, who has more gravity Sue or Tom?
(Answer)
Tom