We feel certain that the campaign is helping to

Solution

The word ‘galvanise’ means ‘to cause someone to suddenly take action, especially by shocking or exciting them in some way’. It is correct here. Hardened- to cause someone to suddenly take action, especially by shocking or exciting them in some way. It is grammatically incorrect here. ‘Harden’ would have been correct. Unanimously- in a way that is agreed or supported by everyone in a group. Control- to order, limit, or rule something, or someone's actions or behaviour. It is inappropriate here.