According to christian beliefs, where's Gandhi now?

[Husar]

What decision making?

How about the decision to eat the apple despite god's order not to eat them?
There was temptation involved, why would the snake need to temptate them if they would either
a) only do what god told them, in this case any temptation would bear no fruit, or
b) do whatever anyone told them to, in this case temptation would be superfluous, an order would get there faster

The snake made a tempting offer and convinced Eve to the point where she decided to break the rules and eat the apple, then Eve convinced Adam to decide to break the rules, too and that's why they were thrown out of paradise, because they gave in to temptation and decided to break the rules (aka sinning).