Which is a valid statement about rock formation? a. igneous rocks all formed under circumstances that no longer occur on earth b. sedimentary rocks form today the same way that they formed in the past c. on one really known how metamorphic rocks form

B. sedimentary rocks form today the same way that they formed in the past.

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation:

ecological efficiency: % of usable energy transferred as

biomass from one trophic level to the next typical is 10% efficient (90% of

energy is lost),is diagramed as the pyramid of energy flow. then osprey eagle

are tertiary consumer and the shrimp are primary consumer, so to balance

mass of shrimp (1/0.1) / 0.1 = 100 kg