It’s B why do I have to write 20 characters
Answer:
it cannot be easily degraded in our environment.Like humans, animals and plants are exposed to PBTs in the environment through air, water and food. ... Persistent bioaccumulative toxic substances (PBTs) are chemicals that do not degrade easily in the environment.
Answer:
d they respond to pathogens
Salt marshes are diverse ecosystems because there are resources from both
