Select the most appropriate option to fill in the blank.

If broadly beneficial immigration is to be sustained, destination countries must acknowledge and _______ the real risks that it raises.

address

The most appropriate option to fill in the blank is:

Option 1: address

Explanation: The sentence is discussing the need for destination countries to acknowledge and deal with the real risks associated with immigration. The word "address" fits the context as it means to confront or deal with a problem or issue. The other options do not convey the same idea of taking action to handle the situation.