Which sentence is in first person?

The sentence "I play soccer every Saturday" is in the first person because it uses the pronoun "I," which indicates that the speaker is referring to themselves. First-person perspective is characterized by the use of pronouns like "I," "me," "we," and "us," as it reflects the speaker's own experiences or actions. This allows the individual to share personal thoughts, feelings, or activities directly related to them. In contrast, the other sentences use third-person pronouns like "she," "they," and "he," which indicate that the statements are about other people rather than the speaker themselves. This distinction is crucial in identifying the perspective in writing.