Directions: Each of the following sentence completion questions contains one or two blanks. These blanks signify that a word or set of words has been left out. Below each sentence are five words or sets of words. For each blank, pick the word or set of words that best reflects the sentence’s over- all meaning.

The earth is a planet bathed in light; it is therefore （）that many of the living organisms that have evolved on the earth have（）the biologically advantageous capacity to trap light energy.