Which mountains were an obstacle to simon bolivar's efforts to unify gran colombia

I believe the answer is: the andes

Simon Bolivar aware that Crossing the andes would take out a lot of time and resources for simon bolivar's army.

But, The conviction that Simon's army would not be able to cross the andes also make the opposition lower their guard.  On may 23rd,  Simon Bolivar confided his plan to finally brought his army across the Andes,  and surprise the enemy on the New Granadan side.

the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.

hello,

the steamboat is your answer.

it seems like its the only form of transportation on the choices.