Answer: The second apparition depicts a bloody child, it tells Macbeth that no man born of woman shall hurt him.
He feels he can ignore it because Macduff was born of woman.
Explanation: The first apparition given to Macbeth is that he must stay wary of Macduff. The second apparition tells him “no man born of woman can do him harm”. He feels that he shouldn’t fear Macduff because he assumed that Macduff was also born of woman. He makes the connection that Macduff can not hurt him.