Explanation
The relationship between the words "Encourage" and "Restrict" is that they are antonyms, meaning they have opposite meanings.
"Encourage" means to support or promote something.
"Restrict" means to limit or control something.
Similarly, the word pair "Dearth" and "Surplus" are also antonyms.
"Dearth" means a scarcity or lack of something.
"Surplus" means an excess or abundance of something.