Answer:
I think it is the excretory system
20.
They told me that my answer was too short so I'm just adding this on, don't mind me.
The correct answer is B The young sun's solar winds pushed gases outward to the outer solar system.
Answer:
In natural environments, horses typically live in relatively stable social units. Horses live in herds so that they are able to fulfil their basic needs, which are to avoid danger or harm, and to reproduce successfully and bring up healthy foals.
