Question

everybody can appreciate acts of kindness. but when it comes to explaining why we do them, people often take one of two extreme positions. some think kindness is something we do out of love and care, while others believe it is just a tool that we cunningly use to become more popular and reap the benefits.
but research shows that being kind to others can actually make us genuinely happy in a number of different ways. we know that deciding to be generous or cooperating with others activates an area of the brain called the striatum. interestingly, this area responds to things we find rewarding, such as nice food and even addictive drugs. the feel - good emotion from helping has been termed \warm glow\ and the activity we see in the striatum is the likely biological basis of that feeling.
of course, you dont have to scan brains to see that kindness has this kind of benefit. research in psychology shows a link between kindness and well - being throughout life, starting at a very young age. in fact, even just reflecting on having been kind in the past may be enough to improve teenagers mood. research has also shown that spending extra money on other people may be more powerful in increasing happiness than spending it on yourself.
but why and how does kindness make us so happy? there are a number of different mechanisms involved, and how powerful they are in making us feel good may depend on our personalities.

Explanation:

The text mentions that being kind activates the striatum (brain area) and there's a link between kindness and well - being (mood). Option B combines the brain (striatum) and mood (well - being) aspects. Option A (memory) is not mentioned. Option C (physical health) is not in the text. Option D (confidence) is not stated.

Answer:

B. affects your brain and mood