Answer:
Option-1, 2 and 5
Explanation:
In the given question, the evolution of Muscles in response to natural selection pressure that is crabs has been given.
In the given question, since the Mussels produced the thick crabs, therefore, the Mussels adapted to the natural pressure and increased their reproductive rate.
These Mussels now reproductively isolated grew to a larger number and a new trait is distributed in the population.
The Mussels with the thicker shell has higher reproductive rate as the crabs are unable to eat them.
Thus, the selected options are correct.