Question

1. what is a diurnal motion?

a. autumnal equinox
b. eastward rise of stars

1. which does not involve the suns ecliptic path?

c. summer solstice
d. zodiac cycle

Explanation:

1. Diurnal motion is the daily motion of celestial bodies. Autumnal equinox is about equal day - night length, not directly related to diurnal motion of stars.
2. Summer solstice is related to the Sun's position in its annual cycle, not the Sun's ecliptic path in the context of what doesn't involve it among the options.

Answer:

1. A. Autumnal equinox
2. C. Summer solstice