How is the Vertebrate Circulatorium an example of technology that benefits people? a Circulating their blood c. Teaching us about scientific discoveries b. Euthanizing vertebrates d. Cleaning up pests Please select the best answer from the choices provided ​

Consider hydrogen in an excited state n = 5n=5 that emits photons to reach the ground state. there are various possible transitions other than straight to the ground state that can occur; for example, it can drop to the n = 3n=3 state followed by the n = 3n=3 to the ground state transition. which of the possible transitions will result in the emission of a photon in the visible region?