Oil spills in bodies of water (a) have a little effect on water organisms. (b) only affect life at the bottom of the water. (c) can severely affect the waterfowl and other organisms living on the surface of the water. (d) are not affected by tides. i need this answer to be correct it’s for an exam : ) .

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?