What made the journeys across africa dangerous

Journeys across Africa are dangerous because there is little to eat and to drink and there is a lot of people out there that can kill you for fun.

Explanation:

maybe the animals? there are lions around eating people

answer; i believe that the correct answer is (d); // supercontinent

answer; not notated (at least, not in the traditional sense) and includes many improvised sections and solos;