Final answer:
The phrases that most contribute to a mood of suspense are "trouble began when", "dangerously ambitious", and "which is to say".
Step-by-step explanation:
The phrases that most contribute to a mood of suspense are "trouble began when", "dangerously ambitious", and "which is to say". These phrases create an atmosphere of uncertainty and anticipation, making the reader feel on edge. For example, "trouble began when" suggests that something negative is about to happen, while "dangerously ambitious" implies potential danger or risk. Similarly, "which is to say" leaves room for interpretation, adding to the sense of mystery and suspense.
Learn more about The impact of specific phrases in creating a mood of suspense