Ok let's see.
So the first one is right since it is a conjugated alkene.
the second one is still confusing, the carbon on the right is tertiary and the one on the left is secondary, now this is confusing, since in this reaction we don't get carbocation, we look at the more sub alkene, but both of them can lead to 3 subs on the alkene, unless the one on the right forms a double bond through between the chain and the cyclohexane and we consider the cyclohexane two subs.
third one;s answer is the molecule on the right since it will give us more sub alkene.
forth one is the molecule on the right since it also gives us more sub alkene.
5th one is also same reason.
so basically only the second one remains confusing.