Question

vortex has the same or almost the same meaning as: clout fissure idiom swirl

Explanation:

A "vortex" is a mass of fluid that spins around a center, creating a spiral - like motion. A "swirl" also refers to a twisting, spiraling motion. "Clout" means influence or power. "Fissure" is a crack or split. "Idiom" is a group of words with a figurative meaning. So "swirl" is the closest in meaning to "vortex".

Answer:

D. swirl