It is between A and B.
But if the species is going to be extinct, that means that they are being threatened.
So the answer is B.
Answer:
The main step to prepare herbarium sheet are:
Collection and pressing of specimens. Fresh materials are pressed in plant press in herbarium press. ...
Drying of specimens. ...
Mounting of specimens on herbarium sheets. ...
Labeling of specimens. ...
Because of genetic drift the existance of species is assured.so <span> genetic diversity important to the concept of natural selection</span>
Light energy into chemical energy