__ used on the waterways are like the turn light indicators used to signal intentions on the highways. a sound signals b lateral markers c colors

## Step 1<br />The problem is asking us to identify what is used on waterways to signal intentions, similar to how turn light indicators are used on highways. The options provided are sound signals, lateral markers, and colors.<br /><br />## Step 2<br />We need to consider each option and determine which one is used to signal intentions on waterways. <br /><br />## Step 3<br />Sound signals are used in various situations, but they are not typically used to signal intentions on waterways. <br /><br />## Step 4<br />Lateral markers are used to indicate the right or left side of a waterway, but they do not signal intentions. <br /><br />## Step 5<br />Colors are used on waterways to signal intentions. For example, red indicates a no-go zone, green indicates a safe zone, and yellow indicates caution.