Can any one help pls if u can’t see it pls zoom the picture ty

Can someone me with this and tell me what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Spring tides, when the high tides are at their highest and low tides at their lowest. what is it about these positions that causes these high and low tides?