Answer:
internal migration: moving within a state, country, or continent.
external migration: moving to a different state, country, or continent.
Explanation:
By muscles. Muscles move body parts by contracting and then relaxing. (Muscles pull on the joints, allowing us to move.) Muscles can pull bones, but they can't push them back to the original position. So they work in pairs of flexors and extensors.
Examples:
+Jumping: form of locomotion or movement
+Running: __________________________ (As above)
9,-1
China is the country that imports most of the oil from Russia
