What does a flat sign do to a note

Anyone have a site they can give me so i can get some drawings tutorials?

Stanley, an art historian specializing in european history, wrote a critique of this painting for a newspaper. in a part of the critique, he wrote, “the overall effect of the work suggests that the artist understands the romance of venice and its boating culture.” which step of the critique does this statement represent?

Alex thinking about repleacing the word feared at the end of paraghaph 2 with dreaded. why do you think he want to make that change