The phrase "are precipitated" can be swapped out for several synonyms to help improve writing style and overall vocabulary diversity. Some examples of synonyms include "are caused," "are induced," "are triggered," "are instigated," "are brought about," and "are prompted." Each of these words adds a different nuance of meaning to the sentence, allowing the writer to convey their message more precisely. Choosing different synonyms can also add variety to a piece of writing, making it more engaging to the reader. Regardless of which synonym is chosen, it's important to consider the context and tone of the sentence to make sure the appropriate word is used.