I was making a scene and, due to the bad computer I'm making it on, I have to create the render every time instead of going into render view. Suddenly, the render only showed the background, and I tried to figure out why but all of the normal reasons why that would be the case weren't the case (i.e. hidden, in a different layer). I've only been using Blender for about a month, so please go easy on me. (If you'd like to include a critique of the water or plane/B24 liberator in your answer, please do!)
After:
Render:
https://drive.google.com/file/d/1RqtMF7aQLyeFOmxrncZIgfk0pC-sNb0I/view?usp=sharing