▁Mountain ▁Province . ▁It ▁mainly ▁consists ▁of ▁the ▁Bal anga os ▁and ▁G add angs , ▁with ▁a ▁significant ▁portion ▁who ▁identify ▁as ▁part ▁of ▁the ▁Kal ing a ▁group . ▁The ▁Bon tok ▁live ▁in ▁a ▁mountain ous ▁territory , ▁particularly ▁close ▁to ▁the ▁Ch ico ▁River ▁and ▁its ▁trib ut aries . ▁ ▁Min eral ▁resources ▁( g old , ▁co pper , ▁lim estone , ▁gy psum ) ▁can ▁be ▁found ▁in ▁the ▁mountain ▁areas . ▁Gold , ▁in ▁particular , ▁has ▁been ▁tradition ally ▁extracted ▁from ▁the ▁Bon to c ▁municipality . ▁The ▁Ch ico ▁River ▁provides ▁sand , ▁gra vel ▁and ▁white ▁cl ay , ▁while ▁the ▁for ests ▁of ▁Bar lig ▁and ▁Sad anga ▁within ▁the ▁area ▁have ▁r attan , ▁b am bo o ▁and ▁p ine ▁trees . ▁ ▁Bon to ks ▁have ▁three ▁different ▁ind igen ous ▁housing ▁structures : ▁the ▁residence ▁place ▁of ▁the ▁family ▁( k aty uf ong ), ▁the ▁d orm itories ▁for ▁females ▁( olog ), ▁and ▁the ▁d orm itories ▁for ▁males ▁( ato / ator ). ▁D ifferent ▁structures ▁are ▁mostly ▁associated ▁with ▁agricult ural ▁needs , ▁such ▁as ▁rice ▁gran aries ▁( ak ham ang ) ▁and ▁p ig p ens ▁( kh ongo ). ▁ ▁Trad itionally , ▁all ▁structures ▁have ▁in ate p , ▁c og on ▁grass ▁roof s . ▁Bon tok ▁houses ▁also ▁have ▁numerous ▁ut ens ils , ▁tools , ▁and ▁weapons : ▁like ▁cook ing ▁tools ; ▁agricult ural ▁tools