The organism Giardia lamblia is a single-celled, heterotrophic, motile
animal-like protist without a cell wall that causes diarrhea in humans.
According to these characteristics, why is Giardia classified as a protist
instead of an animal? In other words, why doesn't Giardia lamblia "fit" in
Kingdom Animalia?

D)

Explanation:

The main reason as to why stars seem to move like planets in the night sky is because of our Earth. The Earth is rotating on it's axis as well as revolving around the sun at the same time. Therefore turning once around us every 24 hours, which to us makes it seem as though the starts are moving like the rest of our planets do around the sun.