Which model best summarizes the importance of solar energy for life on earth?
a. the electromagnetic spectrum
b. the carbon cycle
c. a food web
d. a mitochondrial matrix

The correct answer is option C, A food web

A food web represents the hierarchical order of feeding in a set of organisms with in a given ecosystem. It also represents the transfer of food energy from trophic level of food web to other trophic level. Basically if a food web if represented as a pyramid, the base position will be occupied the producers which trap the solar energy to produce food. At each trophic level 10% of the energy of its previous trophic level is retained while rest all is released. The entire food web is basically a web of energy and is very essential for the survival of the living beings with in an ecosystem.  

b. read the phase at the intersection of any given temperature and pressure.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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