Ответ:

{
"safari": [
"going on a jeep ride",
"taking photos",
"trekking in the mountains"
],
"sightseeing holiday": [
"visiting historic sites",
"buying souvenirs",
"trying local food"
],
"beach holiday": [
"sunbathing",
"diving",
"surfing",
"snorkeling",
"water skiing"
],
"activity holiday": [
"windsurfing",
"sailing",
"trekking in the mountains",
"diving",
"surfing",
"snorkeling",
"water skiing"
]
}