Final answer:
The appropriate biosafety level for handling Ebola viruses is Biosafety Level 4 (BSL-4) which is the highest level of containment used for highly hazardous and exotic agents.
Step-by-step explanation:
The appropriate biosafety level for handling Ebola viruses is Biosafety Level 4 (BSL-4). BSL-4 is the highest level of containment and is used for research with highly hazardous and exotic agents that pose a high risk of aerosol-transmitted infections and for which no treatments or vaccinations are available. Examples of BSL-4 agents include Ebola virus and Marburg virus.