If you write a sentence with an unclear antecedent, it means you used
a. an object pronoun instead of a possessive pronoun.
b. a plural pronoun when a singular pronoun was needed.
c. a possessive pronoun instead of a subject pronoun.
d. a pronoun that could refer to more than one person, place, or thing

The correct answer is d. a pronoun that could refer to more than one person, place, or thing.

An example of an unclear antecedent is:
Jim and Billy were going to the park until he tripped on the curb and sprained his angle.

The unclear antecedent is he. Who does he refer to? Does it refer to Jim or to Billy? To make it a proper antecedent, you would need to replace he with Jim or with Billy.

the swan might be a metaphor for our soul, which is ancient and timeless. the speaker wants to know where it's going and what it wants, what's the purpose in life. he asks our soul to follow him in knowing that god is us and the answer to the question "who am i" that was written on the wind of god's whim to know himself that blew over his being in the beginning of creation. and to connect to god consciously on the path to knowing him is the joy of loving him, like a bee that will grow and end our sorrows by ending desire. in that connection there is no doubt about god and existing forever.