Im
72.
R2-4
Lim {222 727
2- 2
lim (x2 - 1)
nel
soln
infructs)

sound moves fastest in solids because the molecules are tightly packed and it allows sound to vibrate

carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.

answer///systemic;