Answer:
to provide water for crops
Explanation:
The reason why Ancient Egypt developed irrigation systems was so that they would provide water for crops.
Ancient Egypt was civilized and more advanced than mose other civilization and they developed irrigation so that they could water their plants.
Hmmm.....I'd say it was probably depressing lol
Answer:
(1) Mecca to Constantinople is one such route in spread of Islam.
(2) Mecca to India is second trade route .
(3) Mecca to Alexandria is the third trade route
(4) Mecca to Aden is the fourth trade route.
These 4 trade routes came very handy in spread of Islam.
I think this what what you where looking for... Hope it helps!