laravel select error

1 $this->validate($request, [
2            'First_Name'    => 'required',
3            'Last_Name'     => 'required',
4            'Email'         => 'required',
5            'Phone'         => 'required',
6            'Fax'                        ,
7            'Company'                    ,
8            'Marketplace'   => 'required',
9            'Order_Number'  => 'required',
10            'Address_1'     => 'required',
11            'Address_2'                  ,
12            'City'          => 'required',
13            'State'         => 'required',
14            'Zip_Code'      => 'required',
15            'Test'          => 'required',
16            'Product_Name'  => 'required',
17            'Quantity'      => 'required',
18            'SKU'           => 'required',
19        ]);
20