The correct answer is: [A]: "ecotourism" .
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Note that "recreation" is an example of a "non-extractive resource" .
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I believe it is the nitrogen base. Adenine pairs with Thymine, and Cytosine pairs with Guanine.
:)
Answer: Invasive species can harm both the natural resources in an ecosystem as well as threaten human use of these resources. An invasive species can be introduced to a new area via the ballast water of oceangoing ships, intentional and accidental releases of aquaculture species, aquarium specimens or bait, and other means.
Sirius B is brighter than the sun.
