Final answer:
Costa Rica has most notably prioritized renewable energy as a means of environmental conservation.
Step-by-step explanation:
The means of environmental conservation most notably prioritized by Costa Rica is A. renewable energy.
Costa Rica has made significant progress in utilizing renewable energy sources such as hydropower, wind power, and geothermal energy to reduce its carbon footprint and promote sustainability.
For example, the country has been able to generate a substantial portion of its electricity from renewable sources, making it a leader in renewable energy in the region.