and both concluded that the Earth is extremely old and the processes that changed Earth in the past are the same in present day.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

[content deleted] - user123802726recklesschicken

velocity and height

if you look up in the top right corner you'll see your current profile picture, click than click "view profile" you'll be able to change it there.