Question

How did Bard know where the weak spot was in the dragon's armor?

Question 2 options:

The thrush told him


Bilbo told him


Thorin told him


He guessed

Answer 1

The thrush told him

Step-by-step explanation:

The thrush is speaking. This is the culmination of Bilbo's recollection in a previous chapter. The thrush notifies bard of Smaug's weakness, thus helping him take down Smaug.