Why did the Portuguese built Fort Jesus

Fort Jesus, located on the edge of a coral ridge overlooking the entrance to the Old Port of Mombasa, was built by the Portuguese in 1593-1596 to protect their trade route to India and their interests in East Africa. ... Mombasa became Portugal's main trading centre along the East Coast of Africa.

Same like that

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

which statement best describes the relationship between the fourteenth amendment and the african american civil rights movement?