What reasons could be attributed to for the difference between the terrestrial and the jovian planets?

1. (i)  The terrestrial planets were formed in the close vicinity of the parent star where it was too warm for gases to condense to solid particles. Jovian planets were formed at quite a distant location.
   
   
2. (ii)  The solar wind was most intense nearer the sun; so, it blew off lots of gas and dust from the terrestrial planets. The solar winds were not all that intense to cause similar removal of gases from the Jovian planets.
   
   
3. (iii)  The terrestrial planets are smaller and their lower gravity could not hold the escaping gases.