scours the sea floor and leaves scars in soft sediments, and releases bottom nutrients that can induce bacterial growth.
longlining
trapping
trawling
none of the above.

Trawling scours the sea floor and leaves scars in soft sediments, and releases bottom nutrients that can induce bacterial growth.

Option C

Explanation:

Trawling is a method for fishing with the net gears in the sea waters. The method induces the trawl which is the fishing net into the sea water much deeper to the sea floor and when these trawls are lifted by the trawlers who are the men fishing, scours the floor of the sea.

This let to the scar formation in the soft upper layer of sediment of the sea floor. As the scar is made, it resurfaces the nutrients trapped in it to be released, and hence due to the nutrients, microbial introduction leading to bacterial growth is evident.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects