1.an electrician is deciding what type of material to use for wires. based on the periodic table, which of the following would be the best material and reason for its use?

Scientists follow specific processes in order to determine valid explanations and conclusions from observations. david observed strange lights in the sky above his home outside of roswell, new mexico. the only explanation that makes sense to him is that there are ufos in the area. what should david do next to verify his explanation?