What is the purpose of using the OBJECT_CONSTRUCT function with me COPY INTO command?

Reorder the rows in a relational table and then unload the rows into a file

Convert the rows in a relational table lo a single VARIANT column and then unload the rows into a file.

Reorder the data columns according to a target table definition and then unload the rows into the table.

Convert the rows in a source file to a single variant column and then load the rows from the file to a variant table.