Answer: Okay!
Explanation: Well then the third thing could be dead plant? You already have 2 other things
Hi , the answer is silicon.
56 cm

because 1 cm

=1mL
2200000 mg because 1 kg = 1000 mg
2.2 km because 1000 m = 1km
"Kilo" means 1000.
Question 3 is uniformitarianism
Question 4 is sedimentary rock