Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: Like a blanket on a sleeping person, greenhouse gases act as insulation for the planet. The warming of the atmosphere is because of insulation by greenhouse gases. Greenhouse gases are the component of the atmosphere that moderate Earth's temperatures. Answer: insulation

Output: Like a blanket on a sleeping person, greenhouse gases act as what for the planet?

Input: Consider Input: Passage: Equinox comes halfway between the two solstices. At equinoxes, the Sun's rays shine most directly at the Equator ( Figure below ). The daylight and nighttime hours are exactly equal on an equinox. The autumnal, or fall, equinox happens on September 22 or 23. The vernal, or spring, equinox happens March 21 or 22 in the Northern Hemisphere. Answer: equinox

Output: What event occurs between the two solstices?

Input: Consider Input: Passage: Interspecific competition often leads to extinction . The species that is less well adapted may get fewer of the resources that both species need. As a result, members of that species are less likely to survive, and the species may go extinct. Answer: extinction
Output: What does interspecific competition between species often lead to?