I think d is the answer of the first step and a is the second step answer
On a bright sunny day, why does the pavement get very hot? Radiation transfers heat to the pavement through empty space. Because the pavement is black, it absorbs more heat. ... Radiation- heat transfers from the fire to you through empty space.
1. A
2. C
3. D
Hope it helps
The conjunction that should fill in the blank in this sentence is the
word OR. So, you can retake the test tomorrow or you can do some
extra-credit work, These types of conjunctions, called correlative
conjunctions, always go in pairs, such as either-or, neither-nor, not
only-but also, etc. So, the conjunction is used to show that a person
has to choose between these two things. Nor cannot be used because it is
a negative conjunction. But and and do not fit here.