Abiologist is studying a food chain in an ecosystem. in the food chain, wolves eat foxes, the foxes
eat rabbits, and the rabbits eat grasses.
which group of organisms is on the trophic level that holds the least amount of energy?
the wolves
the grasses
the foxes
the rabbits

the wolves

Explanation:

Before answering this question we must understand that the main source of energy comes from the sun. Photosynthetic organisms, such as plants and algae, transform this solar energy into chemical energy, using it to synthesize organic matter through the photosynthesis process. These organisms are called autotrophic (produce their own food). Within a food chain these organisms represent the trophic level that contains the largest amount of energy that will be passed to the next trophic level which is a herbivore animal that will feed on these plants. The animal that feeds on the herbal animal will receive less energy and the animal that feeds on it will receive much less energy and so on.

Thus we can conclude that in the food chain shown in the question above, the trophy that will receive the least energy is the wolves.

a fossil fuel is a fuel formed by natural processes, such as anaerobic decomposition of buried dead organisms, containing energy originating in ancient photosynthesis.[1] the age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes exceeds 650 million years.[2] fossil fuels contain high percentages of carbon and include petroleum, coal, and natural gas.[3] other commonly used derivatives include kerosene and propane. fossil fuels range from volatile materials with low carbon to hydrogen ratios like methane, to liquids like petroleum, to nonvolatile materials composed of almost pure carbon, like anthracite coal. methane can be found in hydrocarbon fields either alone, associated with oil, or in the form of methane clathrates.

the theory that fossil fuels formed from the fossilized remains of dead plants by exposure to heat and pressure in the earth's crust over millions of years was first introduced by andreas libavius "in his 1597 alchemia [alchymia]" and later by mikhail lomonosov "as early as 1757 and certainly by 1763".[4] the first use of the term "fossil fuel" was by the german chemist caspar neumann, in english translation in 1759.[5]

in 2017 the world's primary energy sources consisted of petroleum (34%), coal (28%), natural gas (23%), amounting to an 85% share for fossil fuels in primary energy consumption in the world.[6] non-fossil sources in 2006 included nuclear (8.5%), hydroelectric (6.3%), and others (geothermal, solar, tidal, wind, wood, waste) amounting to 0.9%.[7] world energy consumption was growing at about 2.3% per year. in 2015 about 18% of worldwide consumption was from renewable sources.[8]