Beasts of burden mainly.
they brought camels to carry gold and salt, food and water
by camels and on foot
camels
North Africans began trans-Saharan trade around the 4th century BCE. Camels were introduced to the region later, around the 1st century CE. This means that camels were introduced roughly 400 to 500 years after the start of trans-Saharan trade. The introduction of camels significantly transformed trade dynamics in the region, allowing for more efficient transportation across the Sahara.
Because they are the only practical way of crossing vast regions of desert.
Camels are very helpful because long ago, people use to use camels as a truck. They would store tons of pounds on one creature. Camels are one of the strongest animals.
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they just use them
if there are roads, we can use truck, or motorbike
yes the 3 humped camels from Tibet frequently use phones for finding water holes
they use camels to ride
they won't them