cudeco shorting activity, page-295

Absolutely with you Maam.

"Drivel not Dribble. (no offence)"

You are so correct the meaning required is No. 3.
Drivel
1. To slobber; drool.
2. To flow like spittle or saliva.
3. To talk stupidly or childishly.

drivel is similar to dribble, though dribble means

1. To flow or fall in drops or an unsteady stream; trickle: Water dribbled from the leaky faucet.
2. To let saliva drip from the mouth; drool.

(obviously we are not using our mouths to manoeuvre a soccer ball by dribbling - gotta love the English language)

Dribble has absolutely no connection to talking, whereas drivel specifically does relate to talking.

Sorry for the English grammar lesson.