Select the most appropriate option to fill in blank number 3.
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. irregular.
"Irregular" refers to migration that is not consistent or follows unpredictable patterns, which fits the context of people moving due to deteriorating conditions.
The other options don't make sense in this context:
Regard means attention or consideration, unrelated to migration.
Fast refers to speed, which doesn't fit the idea of migration patterns here.
Fixate means to focus intensely on something, which doesn’t make sense in the context of migration.