Question

which of the following is measured by tracking the suns position in the sky over time?
a a lunar cycle
b a month
c a year
d a day

Explanation:

A year is determined by Earth's revolution around the Sun. Tracking the Sun's position over time (as Earth orbits) helps measure a year. A lunar cycle (A) is about the Moon. A month (B) has variable definitions (e.g., lunar or calendar - based, not directly Sun - position - tracked for the general concept here). A day (D) is based on Earth's rotation (Sun's apparent daily movement, but the question says "over time" in a longer - term sense).

Answer:

C. a year