Therefore, the pronoun must be singular. Traditionally, he and his were pronouns used to refer to both sexes when the antecedent was unknown. Society now feels that this usage is unfair to women, so one male pronoun should be avoided in sentences. Here are three alternatives. Make the sentence plural.
All persons have to face their fear of sharks.
Each person has to face his or her fear of sharks. Use the or avoid the singular pronoun. Each person must face the fear of sharks. F. Pronouns Must Clearly Refer to Definite Antecedents. Here is the case of the vague pronoun which could refer to more than one part of the sentence.