Explain briefly why the train is called a shongololo​

When the indigenous people of the southern continent observed the first trains in Africa the lines of rolling stock passing on the distant horizons recalled the profile and sinuous movement of a creature, they called "Shongololo" - "the millipede".

Explanation:

a.indigo and cochineal

b.animal hides

c.silver and gold

e.cacao beans and sugarcane

good question. i'll be looking into that. (this is a joke sir)