Need help with all 3 please :)

A. Commensalism because the flatworm benefits while the horseshoe crab doesn't but isn't affected.

B.  Predator-prey since the shark is the predator and the seal is the prey.

C. Competition because the two males are fighting for the female.

Hope this helps :)

c. establishing proper sleep hygiene

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.