D seismic waves refract or bend to bounce off differently according to the object or material you have
Answer:
A
Explanation:
because they are kept on certain criteria and boundaries.
5 major threats to biodiversity, and how we can help curb them
Climate change. Changes in climate throughout our planet's history have, of course, altered life on Earth in the long run — ecosystems have come and gone and species routinely go extinct. ...
Deforestation and habitat loss. Image: Nelson Luiz Wendel / Getty Images. ...
Overexploitation. ...
Invasive species. ...
Pollution.