Answer:
1. d)
2. a)
3. b)
4. a)
Explanation:
For question 1, all of the words mean a general feeling of attention or alertness except for d), laziness. Laziness means "not paying attention to anything going on around you," and the other three options are the exact opposite of this definition.
For question 2, flinch, wince, and shrink all mean to pull away from something. To grin is to have a large smile, so this has a different meaning than the others.
For question 3, a), c), and d) each mean feeling of happiness or joy. Consternation, on the other hand, means a feeling of dismay or anxiety.
For question 4, to crouch, cower, or cringe is to try to make yourself look smaller. To tower, however, is to make yourself look larger or to loom over everyone else.
If you have any extra questions on definitions and such, let me know!