1. Is your cat red? - Yes, it is.
2. Is the test so difficult? - Yes, it is.
3. Is the car fast? - Yes, it is.
1. Isn't my hair beautiful? - No, it is.
2. Isn't a waterlemon a berry? - No, it is. That is wrong to thonk it's fruit.
3. Isn't tea including not cofein? - No, it is.