Question

How should the author back up his/her claim or argument?​

Answer 1

The author should back up his/her claim or argument by providing evidence. Evidence can be provided as direct quotes, statistics, real life examples, case studies, etc.

Always try to remember this:
C.L.A.I.M
C- cite evidence
L- link to data
A- analyze counter arguments
I- include examples
M- make emotional appeals

Answer 2

The author should back up his\her claim or argument with factual evidence t support their claim .