How was Sacagawea a responsible mother? She crossed the Rocky Mountains.
She carried her baby on her back.
She spoke many different languages.
She taught her children to read and write.

Correct answer is She carried her baby on her back.

Explanation:

While she was participating in the famous Lewis and Clark expedition Sacagawea carried her child on her back, practically sacrificing herself.

First option is not correct as it shows the success of the expedition, not her responsibility towards her child.

The same is with the third option.

Fourth option is not correct as she died while her kids were practically babies.

is there a year set? the question is incomplete

answer; consonant;