When writing about the impact of various factors on a particular event or situation, it's often useful to have a range of synonyms for the phrase "is influenced". Some possible alternatives include: "is affected by", "is shaped by", "is impacted by", "is molded by", "is guided by", "is swayed by", "is determined by", "is driven by", "is controlled by", and "is ruled by". Each of these phrases communicates a slightly different shade of meaning, so choosing the right synonym will depend on the specific context in which it's being used. By having a range of synonyms on hand, writers can describe the ways in which various circumstances, people, or actions impact a particular situation with more nuance and precision.