Voice can reveal things about the speaker and the message. is a listener's perception of how high or low a sound is, is the basic tone that an individual uses most of the time, and is the pitch movement within an utterance.

Pitch; habitual pitch; intonation.

Explanation:

A sound is the form of energy which produces the sensation of hearing in organisms.

A sound is judged on three properties:

Pitch is the rate of vibration of the sound source. As the frequency of sound increases ,the pitch also increases and as the frequency decreases pitch also falls.

Normal pitch of voice that is generally used by a person while usual speaking is called his habitual pitch.

The change in pitch while speaking is called intonation, it gives an impressive tonal quality to the speech.

answer: tributaries flow into rivers.

wetland is a biome that develops when the water gets accumulated in a land exhibiting a huge depression. these form either seasonally or permanently. the water in the wetland comes from rivers, lakes, ocean, flood, rain or other sources. the wetlands includes mangroves, marshes and peatland.

tributaries flow into the rivers develops a wetland because such water will get deposited in the depression and will restrict the original flow of tributary water. hence, water with low drainage current combines with the river water.

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.