Answer:
A model can represent something very large
A model can represent something very small.
A model can represent something that cannot be seen or touched.
A model can represent something very complex.
Step-by-step explanation:
A scientific model is a physical structure which is made to represent the complex system simply and easily. The scientific models could be pictorial, graphical and 3D models.
The models are used by the scientific community to explain the complex system and the researchers to explain the hypothesis.
The models can be made for the things which cannot be touched like micro-organisms, something very large like the solar system, very small like a single cell or a cell organelle and very complex natural events.
Thus, the selected options are correct.