Concept:The seed tube is the passage that guides seeds from the seed drill's metering device down to the soil.
Explanation:The metering device releases seeds at a controlled rate.
These seeds fall into the seed tube.
The seed tube directs the seeds downward to the furrow opener.
The furrow opener then places the seeds into the soil.
So, the seed tube only transports seeds; it does not control the rate, cover the seeds, or open the soil.
Answer:A. transport seeds from the metering device to the furrow opener