Why is earth's temperature just right for life?

Here're the reasons;

1)The right neighbours.
2)The right core.
3) The right star.
4) The right moon.
5) The right crust.
6) The right ingredients.
7) The temperature and ingredients.

A.)Earth’s core is hot enough to heat Earth’s surface. 
B.)Earth’s magnetic field creates suitable temperatures on Earth’s surface. 
C.)Earth’s crust is warmed by heat from the sun. 
D.)Earth’s atmosphere traps heat from the sun, which makes Earth’s temperature suitable for living things. 

Answer after wwii, communist countries in eastern europe formed the warsaw pack, a military alliance, and comecon, an economic alliance;

Answerlife is suffering;