Final answer:
Active, vibrant, and animated all describe things that are full of life or energy, which makes them the three words with similar meanings from the list provided.
Step-by-step explanation:
The three words that have similar meanings from the given list are active, vibrant, and animated. All three adjectives describe something that is full of life or energy. 'Active' suggests being engaged in action or participation. 'Vibrant' often conveys a sense of energy and excitement, especially through color or light but also describes overall liveliness. 'Animated' is used to describe something that is filled with life and spirit, or that which appears to be moving and alive. On the other hand, 'steady' implies consistency and lack of change, and 'idle' refers to a state of inactivity, which are not similar to the first three words.