Question

________ are commonly used for transportation of liquid materials.

Answer 1

Explanation:

pipeline

Answer: pipeline is may the right answer.

Answer 2

Answer:

pipelines are used for the transportation of the liquid materials

Explanation:

pipelinespipelines are used commonly used to transport a liquid materials because in trains and aeroplanes liquid can be leak or the box will be injured by the brakes or accept anything so the pipelines the right way to transport liquid materials