Plz

list 3 ways that scientists and engineers develop, use, and refine models

These are some ways how scientists and engineers develop, use and refine models.

1. Imagine. They have to know what exactly trying to model. They have to imagine and brainstorm what are the things to be considered.

2. Reason. Next, they need to answer the questions brought  from their brainstorming. They need to be able to reason out.

3. Calculate and Predict. Once they know it, that's the time they can start modelling and calculate - and predict.

1.fossils 2.analogous organs 3.homologous organs

Is there any answer choices?