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how do we stay alive.
saber toothed tiger used its thick fur to stay warm.
Camouflage is key to a tiger's safety. They use cover to stay protected. Not many animals will tangle with a tiger, however, except humans.
It helps living things to stay alive/people can use it
hott sex
They absorb the nutrients in the soil and use it.
It helps living things to stay alive/people can use it
They might use acetone as a solvent, but they'd better not ingest it if they want to stay alive!
Breath it to stay alive, and use it with burning to get energy from fuels. That's what oxygen is used for.
Animals are not like humans. They use their days to stay alive and that leaves no room for play.
Koalas use their food the same as you - it's fuel to keep their cells happy and to help the animal stay alive.
For energy so it can get to the fallopian tubes to be fertilized - ie. to move and stay alive.