Students counted 45 sand crabs in a 5-meter by 3-meter section
what was the population density of sand crabs in that section

C. gemstones they are the only non metallic mineral from the list.

C- a hypothesis or d- an observation

U. life is what you go through to become a better person. it makes you stronger, wiser, and more creative. it can be hard but its ok. because i believe everyone was put here for a reason. whether or not you know that reason you should always look towards the future and trust in god for a better tomorrow.be safe and blessed