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 ).
Refer to the input text as context and select the correct relationship between 'Teck Resources' and 'coal' from the available options.
Options: stock exchange, product/material produced, developer, founded by