In Roman mythology, what is the equivalent of the Greek goddess Themis?

In Roman mythology, Justitia is indeed the equivalent of the Greek goddess Themis. Themis represents divine order, law, and justice in Greek mythology, embodying the principles of justice and fairness. Justitia was similarly personified in Roman culture as the goddess of justice, often depicted with symbols such as scales, a sword, and sometimes a blindfold, signifying impartiality.

In contrast, the other deities listed have different associations. Juno is primarily known as the queen of the gods and goddess of marriage and childbirth, Vesta is the goddess of the hearth and home, focusing on domesticity and family life, and Minerva, though associated with wisdom and warfare, is not specifically tied to the principles of law and justice in the same manner as Justitia. Thus, Justitia's role directly corresponds to the essence of Themis, making her the correct answer.