What causes competition between two species?

The influenza virus cause the flu, but not other diseases. why?

How is the national wildlife refuge system similar to the pacific region coastal program? a. both programs are concerned with providing habitats for wildlife b. both programs are primarily concerned with preserving fish species c. both programs have set aside 150 million acres of land d. both programs are under the u.s. fish and wildlife service

The body of water found at number 4 on the map above is the