What is a combination of trustworthiness and expertise that makes us more or less likely to believe or rely on what a source of information tells

If i have enough money, buy a car. a, will b, shall

Which sentence uses whether correctly

Which poems include the theme that memories of beautiful natural places benefit the people who recall them? "to spring" and "lines written in early spring" "to autumn" and "to a butterfly" "to summer" and "the human seasons" "i wandered lonely as a cloud" and "lines on a beautiful spring in a village"