The work is singular, so it should be "includes". Thus, option C, D and E are out.
"based on nature theories" and "amalgamated in" are referring to the pieces of the furnture. So, they should have an "are" before them. Hence, option B is also out.
The work of Matizan that is being exhibited, includes sculpted pieces of furniture that are based on nature theories and are amalgamated in rough wood and metal.
• is being exhibited, includes sculpted pieces of furniture that are based on nature theories and are amalgamated in
• is being exhibited, includes sculpted pieces of furniture that are based on nature theories and
is amalgamated in
• is on exhibition,
include sculpted pieces of furniture that are based on nature theories and are amalgamated in
• is being exhibited,
include sculpted pieces of furniture that are based on nature theories and are amalgamated with
• have been exhibited,
include sculpted pieces of furniture that are based on nature theories and are amalgamated in