In this question, we are asked to match the mountains with the continents they belong to. The given options are:
Option 1: Mount Etna - Asia, Mount K2 - Africa, Mount Kilimanjaro - Europe.
Option 2: Mount Etna - Africa, Mount K2 - Asia, Mount Kilimanjaro - Europe.
Option 3: Mount Etna - Europe, Mount K2 - Asia, Mount Kilimanjaro - Africa.
Option 4: Mount Etna - Asia, Mount K2 - Africa, Mount Kilimanjaro - Europe.
Comparing the options to the given information, we can see that Option 3 matches the mountains correctly with their continents. Therefore, the correct answer is Option 3. Mount Etna is in Europe, Mount K2 is in Asia, and Mount Kilimanjaro is in Africa.