HELP ITS A TIMED TEST PL Which statement BEST explains how energy flows through an ecosystem?

A. Flows through an ecosystem in multiple directions from various heterotrophs to
autotrophs.

B. Flows through an ecosystem in one direction, from the sun or inorganic compounds to
autotrophs and then to various heterotrophs.

C. Cycles through an ecosystem in multiple directions from various heterotrops to
autotrophs.

D. Cycles through an ecosystem in one direction, from the sun or inorganic compounds
to autotrophs and then to various heterotrophs.

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the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.