Answer: Matter and energy are conserved as they pass through a food web.
A food chain is the linear sequence of transfer of food and energy when one organism is fed or consumed by another organism in an ecosystem. A food web is an interconnection of food chains within an ecosystem. In food web, each food chain is dependent upon other food chain for it's food and energy requirements. A food chain comprises of trophic levels according to the type of consumers it exhibit like primary producers, primary consumers, secondary consumers , tertiary consumers and quaternary consumers. At each trophic level of the food chain matter and energy remain conserved in the form of biomass. This biomass is distributed as an outcome of the overall feeding process between the food chains. Therefore, matter and energy are conserved as they pass through a food web.
Energy does not cycle the way nutrients and atoms do. Energy enters the ecosystem from the Sun and exits after the organisms have taken as much as they need. Organisms release energy back into the biosphere as heat.
An opaque object is any object that is not transparent (allowing all light to pass through it), or translucent (allowing some light to pass through it.) Knowing this we can auto-matically dismiss option D),B), and C) because these all let some form of light through them so our answer would then be A) because light does not pass through wood like it would the others.
