Final answer:
Snowball's action of giving the signal of charge and dashing straight for Jones shows that he engaged in an attack, hence Snowball attacked Jones is the correct answer.
Step-by-step explanation:
Snowball's action in the text is indicative of an attack. When it is mentioned that Snowball gave the signal of charge and he himself dashed straight for Jones, it leads to the conclusion that Snowball's direct action was to engage in an attack, particularly against a character referred to as Jones.
Therefore, the correct action that Snowball took, according to the context provided, is that Snowball attacked Jones.