Our analysts have initiated coverage on the coal industry with focus on the following companies: Vale S.A. ( VALE ), Peabody Energy Corporation ( BTU ), Teck Resources Limited ( TCK ), Arch Coal Inc. ( ACI ), and Rio Tinto PLC ( RIO ).
Utilize the input text as a context reference, choose the right relationship between 'Teck Resources' and 'coal' from the options.
Options: developer, product/material produced, stock exchange, founded by