Final answer:
The fixed part of your identity includes aspects such as biological sex and ethnicity.
Step-by-step explanation:
The part of your identity that is fixed refers to the aspects of yourself that do not change over time or due to external circumstances. One example of a fixed identity is your biological sex. For instance, if you are born male, your biological sex remains male throughout your life.
Another example is your ethnicity, which is determined by your ancestral heritage and does not change. These fixed identities are often used to categorize individuals in various contexts, such as government documents or census forms.