Trauma evidence can most likely reveal which information about a crime involving a knife attack

Trauma, in the medical sense, refers to any injury done to living tissue by an external agent. This can range from a punch causing bruise, purpura or ecchymoses to stab wounds causing cuts and bleeding.

Trauma evidence in regards to a knife attack will tell us the number of stab wounds inflicted by the suspect and also what the physical characteristics of the suspect are. If the stab wounds are deep, then we can probably infer that the suspect has a big build or body. Depending on the trauma evidence given, multiple interpretations can be made.

Because the carnivores keep the herbivore population in check 

Leaves specifically the gas exchange between plants and the environment. while plants undergo photosynthesis, they also partake in cellular respiration. respiration is the process that happens in the leaves of plants.