WORLD HISTORY

Detailed explanation-1: -The findings indicate that the Zagros Mountains intensify the cold period frontal rains especially over the west slope and block the moist air masses from entering the interior parts of the country. Moreover, these mountains play a secondary role in creating rain days.

Detailed explanation-2: -Diyālā River, Arabic Nahr Diyālā, river, important tributary of the Tigris River, rising in the Zagros Mountains of western Iran near Hamadān as the Sīrvān River and flowing westward across lowlands to join the Tigris just below Baghdad, Iraq.

Detailed explanation-3: -Formed by collision of the Eurasian and Arabian tectonic plates, the ridges and valleys extend hundreds of kilometers.