Final answer:
The first constellation of the zodiac named for the ram is Aries, but this option is not listed among the choices. The zodiac consists of constellations through which the Sun, Moon, and planets appear to travel over the course of a year.
Step-by-step explanation:
The first constellation of the zodiac, which represents the ram, is Aries. Hence, the correct answer is not provided among the options given (Leo, Taurus, Gemini, Libra). The zodiac is a narrow strip in the sky where the planets, Sun, and Moon seem to move. The constellations along this path are named mostly after animals, with Aries being named for the ram.
The Sun passes through each sign of the zodiac - each one occupying a 30° sector of the sky - over the course of a year. It's important to note that due to the precession of the equinoxes, the astrological signs no longer align perfectly with the actual constellations. For example, the astrological sign of Aries now actually occupies the space of the constellation Pisces.