A tennis ball traveling 4m/sec has the most kinetic energy because it travels farther in the same amount of time.
1. Likely a vet - as they take care of animals, especially those in pain.
2. Vague, but maybe a travel journalist as they are required to move around to learn more.
3. Architect - work on designing buildings, which fits the criteria.
4. Likely a lawyer because they are easier for rich clients to get, and they are of course in court fighting for their clients.
Synonyms can be found in the reference source, thesaurus.
A writer can express his/her theme through different techniques. Some examples would be word choice, tone, mood, and even characterization. I hope this helps.
