Question

the time that is taken by neptune to travel once around the sun is called ______.

a a neptune year

b a neptune week

c a neptune period

d a neptune day

Explanation:

The time a planet takes to orbit the Sun once is called its "year". For Neptune, this orbital period is specifically termed a Neptune year. A week is a human-defined time unit unrelated to orbital motion, a period is a general term not specific to solar orbit, and a day refers to a planet's rotation on its axis.

Answer:

a. A Neptune year