The advantage of as a means of overcoming change is that once persuaded, people will often with the implementation of the change.

The advantage of education and communication  as a means of overcoming change is that once persuaded, people will often help with the implementation of the change.
This mean is used where there is a lack of information or inaccurate information and analysis. The drawback is that it can be very time-consuming if lots of people are involved.

Yes it was hope that works

Sector is best defined as (part).