Answer:
Trial westward expansion.
Explanation:
In old West America, trails werecommon means of travelling.
they were used by immigrants in the 19th century .
as a substitute to other means of transport it was widely concidered by the imigrants and its pioneers.
The immigrants started occupying the North parts of America .
The major parts of settlement were great Plains as part of the mighty overland migrations of 19th century.
They moved as aresult of major motives such as ,
- religious persecution,
- economic incentives.
This took place in the 19th century.
