1. bus, trolleybus, abuse, microbus, business

2. tourist, touristed, touristic, touristically

3. air, airport, airline, airship, airflow, airbus

Ответ:

bus: businessman; business; businesswoman; bush;  busy

air: aircraft; airfield; airlift; airshow; airline; airport; airless;  airplanes; airliners

Объяснение: