How many civilization were there in the horn of Africa explain 5 of them and which year they began

#4.) describe the most likely weather conditions at indiana / ohio boarder. also could someone double check my other answers? i'd really appreciate it

Which ofbthe following is a characteristic shared by both brazil and mexico

One of the main reasons societies settled along rivers in the neolithic era was because a) the village elders demanded it. b) the land there was more valuable. c) it was more safe and secure there. d) it provided irrigation for farming.