Answer:
Element->c Compound->a Mixture->b
Explanation:
<u>The impact of reef erosion on the coral reef community:</u>
The reef erosion takes place in the shores, and which the coastal properties are being more exposed to the damaging effect of the waves. They become colonised with the help of varied range of the organisms, that includes algae, corals and large diversity of species of fishes. Artificial reefs functions as the inundated breakwater. Then will dissipate the wave energy, which can further reduce the coral erosion and thus will protect the secured boats.
May we have the choices but i will say human impact
The element starts off as 100%. half of 100% is 50% and half of 50% is 25%. the element has emitted 2 times the half life which is 10,000 x 2 = 20,000
the fossil bone is 20,000 years old
