This is cyclic change because the population is consistently going up and back down.
Answer:
Seafloor spreading at the mid-ocean ridge provides the mechanism for tectonic plate movement. The Earth's mantle moves through convection, showing that tectonic plates are able to glide. The location of the plates was determined by locating their boundaries, using data on the Earth's magnetic field.
Answer:
a To provide cows and other live stock with vaccines so diseased do not spread among farmers and cattle herders.
Explanation:
because that one makes the most sense and it is true
Heroin, Oxycodone, Oxymorphone, Hydromorphone.
These are some.
Answer:
I think it's d but I am not too sure