QUESTION: Fix punctuation: The terrain of Colombia make it relatively costly for the separate regions to communicate interact and trade
ANS: The terrain of Colombia make it relatively costly for the separate regions to communicate, interact and trade.

QUESTION: Fix punctuation: By these evils a third part of men was put to death by the fire and the smoke and the burning smell which came out of their mouths
ANS: By these evils a third part of men was put to death, by the fire, and the smoke, and the burning smell which came out of their mouths.

QUESTION: Fix punctuation: Magnificient sea view 50 meters from the center of town
ANS: Magnificient sea view, 50 meters from the center of town.

QUESTION: Fix punctuation: Another 27 of the population believe we will be able to halve the numbers of extremely poor people by 2015 Actually this happened in 2012
ANS:
Another 27% of the population believe we will be able to halve the numbers of extremely poor people by 2015. Actually, this happened in 2012.