Which word is described by this statement? This stony tube runs up the center of the volcano. It may have many branches though which lava flows during an eruption.

sedimentary

vent

composite

cinder cone

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.

answer; the sons of liberty;

answerdavid strayer;

answerbasic anxiety;