Which phrase is the best example of parallelism?

a. she looked up to the sky. the sun was a blazing orange ball.
b. the snow fell softly the sky. soon, everything in sight was in a pillow of white.
c. he collected rocks, pine cones, shells, twigs, and anything else he could find outside.
d. the mud covered his hands. it covered his face. it covered his jeans.

The answer to your question would be that the best example of parallelism is the following sentence: The mud covered his hands. It covered his face. It covered his jeans.

Parallelism, aka parallel structures or constructions, is a balance between one or more sentences of similar phrases or clauses that also have the same grammatical structure. In the example in question, the three sentences have the same transitive verb (to cover), which selects two arguments, making all the sentences similar.

closer examination, however, finds the mcdonald's kind of job highly uneducational in several ways. far from providing opportunities for entrepreneurship (the lemonade stand) or self- discipline, self-supervision, and self-scheduling (the paper route), most teen jobs these days are highly structured — what social scientists call “highly routinized.”  

true, you still have to have the gumption to get yourself over to the hamburger stand, but once you don the prescribed uniform, your task is spelled out in minute detail.