Biotechnology can positively affect the amur leopard population primarily through options that involve reproduction and conservation techniques. The most relevant option in this case is:
B. by providing a way to clone and reproduce amur leopards to prevent their extinction.
Cloning or assisted reproductive technologies can help increase the genetic diversity and population numbers of critically endangered species like the amur leopard. The other options (A, C, and D) do not effectively address the challenges of conserving a critically endangered species like the amur leopard.