4. Petroleum.
Hope this helps!
A because unlimited resources if a lot of value
Greetings!
Oil does not mix with any type of water because it is less dense than water. It normally tends to float on the top of it.
Hope this helps! ~Alexa
I think it is A. but don't take my word for it.
Answer:
Opportunistic.
Explanation:
Pathogen may be defined as the disease causing organism. The opportunistic pathogen causes disease mostly in the organism with weak immune system of the body.
The opportunistic pathogen can cause disease if the environmental condition is favorable for pathogen. These pathogens are not capable of inducing disease in the healthy individual.
Thus, the answer is opportunistic.