<span>Sink
A sink is an area where sugars are used or stored; typically, these are the roots and fruits of a plant.</span>
Well, biotic factors are living things in an ecosystem such as animals or insects. Abiotic factors are non living things in an ecosystem such as sunlight or temperature. I would say biotic factors would be more harmful since this includes bacteria or other diseases, not many abiotic factors would pose a great threat to the entire human species. Hope this helped.
<span>What is the approximate age of our solar system?
</span>b. 4.6 billion years
