I have commanded. Elijah miraculously fed three times: (1) by ravens (1Ki_17:6); (2) by a widow (1Ki_17:9); (3) by an angel (1Ki_19:5, 1Ki_19:6).
ravens. Note "I have commanded". All things possible when He speaks. Almighty power is a better and easier explanation than all rationalistic inventions.
there. Nowhere else. Note the special lesson. Any-where but in God's appointed place he would have perished.