Ответ:

Solution:

  1. boots - trainers - shorts - shoes (shoes are worn on feet, others are clothing items)
  2. cloudy - shabby - hot - windy (hot is a temperature, others describe weather conditions)
  3. go: skiing - diving - camping - swimming (swimming is an activity, others are more general types of holiday activities)

Answer: 1. shoes, 2. hot, 3. swimming.