full of interest and energy

There was an extremely animated discussion on the subject. 这个话题引起了极其热烈的讨论。

They must have been having an interesting conversation - they both looked very animated. 他们一定是在进行什么有趣的谈话，两人看上去都兴致勃勃的。

Animated films, drawings, models, etc. are ones that are photographed or created by a computer and shown in a way that makes them move.