Final answer:
Tara, who identifies as a girl with a matching biological sex, is referred to as cisgender, meaning her gender identity aligns with her sex assigned at birth.
Step-by-step explanation:
Tara identifies as a girl and her biological sex is female, which means Tara is cisgender. This term is used to describe individuals whose gender identity and gender expression align with the sex they were assigned at birth. The prefix "cis" means "on the same side" in Latin, as opposed to the prefix "trans" in transgender, which means "across." It is important to note that being cisgender does not imply a particular sexual orientation or gender expression.