I think it's a mixture.
Sulfur is an element and therefore a homogeneous substance.
Is wood a compound homogeneous mixture a heterogenous mixture or an element. Is steel a homogeneous mixture a heterogeneous mixture an element.
heterogeneous mixture
heterogeneous
compound and element
compound
It is an element.
it is a heterogeneous
heterogeneous
Concrete is a heterogeneous mixture.
Concrete is a heterogeneous mixture.
Homogeneous mixture