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What is the main idea of this paragraph?
Having a model railroad can be really fun. Some people like true models. This means they have a scale model that looks like a real-life railroad in miniature. Others have toy trains that run on a layout they create from imagination. There can be made-up towns, hills, rivers, and so on. Either way, it's exciting to build a track, add all the scenery, and then watch the train run through it.
A. Model railroading is a fun hobby.
B. Model trains are better than toy trains.
C. True models need to be scale replicas.
D. Adding scenery is the most fun part.
A. Model railroading is a fun hobby.