Which is a weakness of traditional food webs when they are applied to complex ecological problems?
a) a food web does not represent all the links in an actual ecosystem. b) food webs do not account for non-native species in the enviornmentc) the many food chains of a food web make it too complicated to use. d) trophic levels are not taken into account when creating a food web.

Answer is A. A food web does not represent all the links in the actual ecosystem.

Explanation:

A food web is a naturally interconnection of food chains. This means that, a food web consists of more than one food chain. Just like the food chain, the food web comprises of the same groups of organisms, that is, the producer, consumer and decomposed, but in large numbers or quantities.

A complete food web diagram is expected to have Sun as the source of light for a situation where plants are the producers.

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the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.