Final answer:
The island with boundaries drawn to separate Greeks from Turks is Cyprus, divided by the Green Line after a civil war in 1974.
Step-by-step explanation:
The island whose boundaries were drawn primarily to divide the Greeks from the Turks is Cyprus. Historically, Cyprus has been a contentious area due to its strategic location in the eastern Mediterranean Sea. The Green Line is a demarcation line that runs through Cyprus, separating the Greek-Cypriot controlled south from the Turkish-Cypriot controlled north. After a civil war in 1974, Turkish groups declared the northern half as the independent Turkish Republic of Northern Cyprus, which is only recognized by Turkey. The United Nations, however, does not recognize this claim and considers the entire island as one country, the Republic of Cyprus. The Greek side reflects Greek heritage and culture, while the Turkish side is influenced by Turkish culture and Islam.