What river in africa was essentially used as a highway to transport gold and salt? a. the nile river b. the niger river c. the kengali river d. the senegal river

ANSWER:

The Nile River in Africa was used as a "highway" to transport "gold and salt".

EXPLANATION:

The Nile has been used by the Africans since ancient times. Nile was used as the river to survive by Africans and also as a trade route for transport of salt and gold. The Nile is the longest river of Africa considered to have the most fertile banks and give rise to the best civilizations of the world. In the ancient times, Nile was considered the only source of survival and living for the Africans and till date the Nile is considered to be the most important river of Africa.  

Search it up or look it up on the dictionarysorry i wasn't any

So  if  the sum of the enthalpies of the reactants is greater than the products, the  reaction  will be  exothermic.  if  the products side has a larger enthalpy, the  reaction  is  endothermic. you may wonder why  endothermic reactions, which soak up energy or enthalpy from the environment, even happen