Question

1. there are four main pathways taken by migratory birds in north america: pacific, central, mississippi, and atlantic. these are called flyways. the same bird species take the same flyways each year. they pass the same spots at predictable times. the routes are ________. a private b familiar c mysterious d lonesome

Explanation:

Since birds take same fly - ways and pass same spots at predictable times, the routes are well - known to them, which means familiar.

Answer:

B. familiar