In the following passage, some words have been deleted. Read the passage carefully and select the most appropriate option to fill in each blank.

Human migration may be traced all the way back to the (1)________ of time, and humans have been on the move ever since. Climate change, war and displacement, economic considerations, living conditions, family and clan (2)________, and, more recently, educational possibilities are all reasons for migration. Because there are several reasons for migration, migration patterns are (3)_________. Potential migrants will not only (4)_________ whether or not to migrate, but also where they will go. Individuals with (5) ________ observed and unobserved features will make diverse decisions and self-select into specific areas.

Select the most appropriate option to fill in blank no. 2.