Some one plese help me i got 4 qustions that are ela and i need help can some one help

How does lennie's puppy die in of mice and men?

Which would be the most credible source for researching the effects of smoking? letter from your grandfather web page about someone’s lung cancer report prepared by a tobacco company research article in a scientific journal

Why does the author of exploring the titanic give background information about his youth and education? to show his lifelong love for the ocean