Umm.. Planting trees gives us more trees...we need trees because they provide oxygen,food(some trees), resources(such as paper), homes for animal(where eles will the squirrel live).
I feel it is the contribution on cotemporary physics.
This is more current than even modern physics.
Please mark me as brainliest.
There is variation in DNA.
Protects, helps thermoregulate, provides sense of touch, helps remove waste
