Gawain gave the Lord a green girdle for the green Knight.
To snow.
Why? "It's beginning to snow." makes the most sense. "It's beginning snowing." doesn't make as much sense.
Billy Jo thinks that the sky is blue because the sun paints it each morning.
<em>Billy Jo thinks that the sky is blue</em>. This is the independent clause. It has meaning by itself.
..<em>because the sun paints it each morning</em>. This is the dependent clause. It does not have meaning by itself. It needs the independent clause. It gives extra information -reason- related to the information in the independent clause.
The answer is C. I'm sure