Complex sentence: Due to lack of fresh water sources on the Islands, they only began to be settled in the 20th century, initially by Bugis fishermen who used the islands as a stop off location for their voyages around the archipelago and began to establish coconut plantations.
Split into simpler sentences: Due to lack of fresh water sources on the Islands, settlement only began in the 20th century. Initially, Bugis fishermen used the islands as a stop off location for their voyages around the archipelago and began to establish coconut plantations.