Answer:
your answer is C I'm positive
The two types of global food webs are the terrestrial and aquatic food webs.
Terrestrial food webs are located or start on land while aquatic food webs are located or start on waters. In this case, these are two connected when one consumer from the other realm becomes part of the food web of the other.
Nails are made of iron because, iron is strong and sturdy; although nail rust when it undergoes oxidation when expose to water but it is not explosive.
Barium and phosphorus are not suitable for nail making because of their properties.
Barium is an element which reacts with virtually all non metals, forming poisonous products which are dangerous to health and to the environment. It also reacts explosively with water.
Phosphorus is not found in its pure form in nature, it conducts electricity and it is combustible in nature.<span />
It be like that sometimes
It serves as a barrier to biological activity.
