Central Texas College Planets and Their Unique Nature Discussion

I need an explanation for this Science question to help me study.

 

1.) How can a planet like Jupiter form so close to the host star well within this frost line?

2.) How does the presence of an atmosphere affect the surface conditions on a planet such as Venus? What are the different ways in which a planet can obtain an atmosphere and why does Venus have such a thick veil of cloud cover while the Earth does not?