List three people who helped make travel to the West easier. Explain what they did. help!!!

Meriwether Lewis, William Clark, and Sacagawea.

Lewis filled in as the field researcher, chronicling natural, zoological, meteorological, geographic, and ethnographic data. He additionally assembled examples to send back East for further examination.  

Clark working as the campaign's important waterman and cartographer on the  The Corps of Discovery. His fantastic maps of the West spoke to the best accessible until the 1840s. In addition, he kept a standout amongst the most devoted diaries on the excursion, and his inventive spelling is notable.

Sacagawea was a Shoshone Indian lady who, as mediator, voyaged a great many wild miles with the Lewis and Clark Expedition .

She turned out to be a critical resource from various perspectives: hunting down consumable plants, making shoes and garments, just as easing doubts of moving toward Indian clans through her quality; a lady and kid going with a gathering of men showed serene goals.

i think its toxic gasses but i could be wrong

the 2nd option is the answer