Complete each of the following sentences by choosing the correct term from the word bank.
loudness, echoes, pitch, noise, solids, sound quality, vibrations, wavelength frequency, wave, vacuum, amplitude, lesser, infrasonics, ultrasonics
Of the three mediums, solids, liquids, and gases, sound travels fastest in ________.

Explanation

To solve the question, we need to determine in which medium sound travels the fastest among solids, liquids, and gases.

### Step-by-Step Solution:

1. **Understanding Sound Propagation**: Sound is a type of wave that travels through different mediums. It is produced by vibrations and requires a medium to travel.

2. **Identifying the Mediums**: The three mediums mentioned in the question are:
- Solids
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