You hazard a couple of guesses at what the answer might be. Your first guess, "phospholipid," somehow gets rejected. Wait, really? Damn, you felt really good about that one. Who doesn't like riddles based on molecular biology? Lame.

Luckily you remember the whole monetary theme of this entire forest and very enthusiastically guess "coin", which is correct! The ATM gives you a lackluster congratulations and says you are allowed access to the Silver Exchange Service with a x2 multiplier.