This element has an atomic number Lower than that of aluminum (AU and one less valence electron that the group 16 elements

feral cats are estimated to eat tens of millions of native animals each night in australia

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

c should be the answer