Which long tube carries food from the mouth to the stomach?.

Esophagus

Explanation:

Esophagus: The esophagus is a muscular tube that connects the pharynx (throat) to the stomach. The esophagus contracts as it moves food into the stomach.

A). Volcanic eruptions change the pH and temperature of the ocean.

Explanation:

Volcanic eruption from an oceanic floor likely to release gases, sediments which can be of high temperature. The sediements will increase the turbidity in the water and will change the pH and the high temperature may not be tolerated by plants and animals. This may be the result of extinction of many species of marine ecosystem.