Thank you very much!
Here are a few other sentences I need you to check.
1) Whales are marine mammals who use a method termed echolocation to communicate with each other (or one another?) . This method consists in producing sounds which are very similar to the songs composed by humans.
2) Echolocation also helps the whales to detect an object which is miles away determining its size, shape, distance and direction.
3) The sound waves bounce off (I need a synonym) the object and are subsequently received by the whale.
4) Wolves do not only roam the Pyrenees but they have also been found on farmers’ land where they pose a threat to sheep. (I can’t understand the word order with “not only” “but also”).
Is it wrong to say "They not only roam the ..."
5) Grizzly bears are ferocious and strike fear into people’s hearts; what’s more/besides (are they both possible?), they increasingly come into towns looking for food.
1 answer
2) Echolocation also helps whales to detect an object which is miles away, determining its size, shape, distance, and direction.
3) The sound waves reverberate and are subsequently received by the whale.
4) Wolves not only roam the Pyrenees, but they also have been found on farmers’ land where they pose a threat to sheep.
http://grammar.ccc.commnet.edu/grammar/conjunctions.htm#correlative_conjunctions
and
http://grammar.ccc.commnet.edu/grammar/parallelism.htm#correlative
5) Grizzly bears are ferocious and strike fear into people’s hearts. In addition, they increasingly come into towns looking for food.
("In addition" can be replaced by any of these: "furthermore" or "what's more," or simply "also."