Charlotte's Web (1973)
I've seen this several times throughout my childhood, and it really resounds with me to this day since I was somewhat the "runt" of my family, about a pig named Wilbur who is saved from the chopping block by the eponymous arachnid's ability to weave messages into her webbing, based on the book by E.B. White, which also had the honor of being one of the very first full-length novels I read and remember. It has a decent musical score as well by the Sherman brothers somewhat reminiscent of their other work, like for Mary Poppins, and the title theme (sung during Charlotte's first nighttime web-weaving) actually sounded to be an inspiration for John Williams' Wizarding World theme.