I'm not sure what your options are, but here's what I've come up with:
The reason for our tardiness was because we got stuck in traffic.
Answer:
You can't make them. They're coordinating conjunctions. For, And, Nor, But, Or, Yet, and So
A pledge,promise, or agreement to do something
The correct answer is 'alliteration'. For instance, this small sentence seems to be a sample of alliteration since some of the words start with the s sound. Remember that consonants are all letters except for a, e, i, o, u, and sometimes y (the repetition of vowels at the start of a word is called assonance).
Hope this helps!