Cloze Test II: Over the past 15 years, various studies have shown a connection between ....(6)....., altruism, and volunteering and less depression. For volunteers, this is the ....(7)..... as long as they don't go overboard and overburden (to do something too much) themselves by ...(8)..... too much or too often. Being unkind to ourselves is also connected to depression and low psychological well-being. ...(9)..... enough, those of us who are struggling might be some of the best ...(10)..... for kindness. Over the years, studies of people fighting disease, chronic pain, and emotional trauma have shown that kindness can help them deal with better and combat negative emotions. Which is the best choice for the blank .......(6).......?
1 kindness
2 stress
3 temperature
4 medicine