What do scientists need to discover about the planet Kepler-186f to be able to conclude that it could support life ? 5+ sentences

Agood deal of what that brain believes it is experiencing depends on its

Which pronoun has an unclear antecedent in the following sentences? the sixth-grade students liked volunteering their time to read to the elderly people in the hospital. it made them happy. a. their b. it c. them d. no unclear antecedents

Are people more motivated to change from positive or negative experiences, like slavery, womens rights, and any other historical movements/moments? i need more factual information than opinions.