Which type of epic poem is a deliberate move away from everyday language?

In a data source, such as a spreadsheet, why is it important that top row be the header?

1. in which sentence is the underlined portion a predicate nominative? for astronauts, going into space to repair orbiting equipment becomes a challenge. for astronauts, going into space to repair orbiting equipment becomes tricky. for astronauts, going into space to repair orbiting equipment becomes challenging. for astronauts, going into space to repair orbiting equipment becomes frequent.

Which part of the writing project should you plan for