Obama?????? i realy dont now
Answer:
The answer is C. Here is proof. It's correct trust me!!
Explanation:
Since this is movement that is occurring against the natural movement from high to low concentration, this is Active transport.
The option C.
The solar system is considered a natural system because it was made and controlled by natural forces, meaning, it was never influenced with human creations. It is considered as one of the products of the phenomenon of the physical world. Hope this answer helps you.
Is a proposition that has not been empirically proven yet, and that attempts to describe or justify a system or phenomenon.
