Q: Does a sea otter eat spiders?
A: no
Explanation: Sea otters prey mostly on marine invertebrates and other aquatic creatures. Spiders are not aquatic creatures and they reside on land.

Q: Do you have to put on glasses to read a QR code?
A: no
Explanation: Glasses are used to improve one's vision capabilities. QR codes are not readable by humans and have to be read by machines or programs.

Q: Does Hades have a loose grip on the Underworld?
A:
no
Explanation: Hades alone can allow passage out of the Underworld. Hades created a terribly difficult task for Orpheus to complete to bring Eurydice from the Underworld. The subjects of Hades in the Underworld are under his complete control.