Will give brainliest answer asap what can you infer from the fact that the disappearance of just one species can disrupt an entire food chain? pick a letter a.)every food chain depends entirely on a single species b)food chains are extremely fragile c)food chains would not exist without humans

If you chip a tooth, most likely you will go to the dentist to have the missing material filled in. currently the material used to fill in teeth is a polymer that is flexible when put in, yet is hardened to the strength of a tooth after irradiation with blue light at a wavelength of 461 nm. what is the energy in joules for a photon of light at this wavelength?