What key idea does the text below suggest?

Its physical condition is still largely a mystery, but we know now that even in its equatorial region the midday temperature barely approaches that of our coldest winter.

Despite gaps in our knowledge, we do know the planet is cooling.

In the middle of the day it is cooler than it should be.

Regions of the planet are cooler than many others on Earth.

The conditions on the planet are still unknown.

Question

What key idea does the text below suggest?

Its physical condition is still largely a mystery, but we know now that even in its equatorial region the midday temperature barely approaches that of our coldest winter.

 Despite gaps in our knowledge, we do know the planet is cooling.

 In the middle of the day it is cooler than it should be.

 Regions of the planet are cooler than many others on Earth.

 The conditions on the planet are still unknown.

anonymous · Answer

Despite gaps in our knowledge, we do know the planet is cooling

anonymous · Answer

A. i think