Elephants are valued by some people because their tusks are made of ivory. although it is illegal, people kill elephants, take the ivory, and sell it to make a variety of objects like jewelry and sculptures. this activity is an example of which threat to biodiversity?

Elephants are valued by some people because their tusks are made of ivory. Although it is illegal, people kill elephants, take the ivory, and sell it to make a variety of objects like jewelry and sculptures. This activity is an example of which threat to biodiversity? poaching

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.