Bakewell's primary contribution to the Agricultural Revolution was through his introduction of cross-breeding for stronger and better animals. He was particularly known for his work with sheep, specifically the Leicestershire sheep, which he bred for better wool quality and meat production. Bakewell's methods of selective breeding allowed for improved livestock that had desirable traits, directly influencing agricultural practices and productivity during that period.
While he did implement various agricultural techniques, including managing feed and grazing practices, it is his pioneering work in animal husbandry and breeding that is most closely associated with his legacy in the Agricultural Revolution. Therefore, the correct answer among the provided options is:
He introduced cross-breeding for stronger and better animals.