Colloid- C)
Emulsion- A)
Heterogeneous- D)
Homogeneous- B)
Hope this helps!!
The correct answer is A.
The official guidelines from doctors state that infants should start consuming solid food after the age of six months. In order for the infants to be safe and healthy, they need to be able to sit up, support their back and chew safely before being given solid food.
so, an example of something that might not be a substrate is the animal itself.
explanation
substrate is the surface of where living animals, live.
sorry if this doesnt help.
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