Help please I will give brainliest

1. biodiversity increases ecosystems productivity no matter on how big, small or type of species (pants included). it will help sustian life on earth because each specie has its own role to play in the ecosystems, wether its to keep control of the amount of a plant specie to keeping the fertilizer good.

2. it increases the probability of other species going instint ruining the ecosystem

3. amphibians are sensitive to climate change. they need certain temperatures to live, certain types of air, and water(depending on the creature)  

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.