Which types of appeals are most often employed in the beginning of a speech to gain the audience's interest and establish credibility

Pathos, logos, and ethos

Explanation:

In simple words,  The objective is to capture the listener 's awareness and establish confidence and the above mentioned three are the best for these.

Ethos can be understood as an ethical appeal that is used to persuade somebody of that persuader's integrity or reliability. Pathos is indeed an emotional response that is used to persuade an audience of a point of view by eliciting an emotional reaction. The appeal to logic, or logos, is a method of convincing an audiences through reason.

d.i almost had them all lined up, and then my baby brother knocked them all over.

this contains a dependent and independent clause, it is not simple.