Eyeglasses have two arms called temples attached to the eye lenses by very small hinges. Which of these functions like the hinges on eyeglasses?

Pick the answer from these options

OPTIONS:
- knee
- fingers
- neck vertebrae
- base of the thumb
knee
Glasögon har två armar som kallas tinningar som fästs på ögonlinserna av mycket små gångjärn. Vilken av dessa funktioner som gångjärnen på glasögon? Välj svaret från följande alternativ: - knä - fingrar - hals kotor - tumbasen
Glasses have two arms called temples attached to the eye lenses by very small hinges. Which of these features like hinges on glasses? Choose the answer from the following options: - knee - fingers - neck vertebra - thumb base
knä
knee