For number one, the shadows are longest at sunrise and sunset, and these are different from the ones cast at noon because they are longest and darkest. Hope this helped! I'll probably come back to help with the second one after I do more research :)
Many living things add oxygen to the oxygen cycle by performing ??
Cells need to reproduce for growth, repair, or replacements. Cells divide whenever a tissue / organ / organism is growing or needs repair.
Hope this helps :)
Fossil fuels are definitely non renewable (such as coal and gas) because they cannot immediately be replenished.
Elements such as wind and water are renewable because they're natural and are regularly produced
