Which option is an example of a biological disturbance in an ecosystem? Select one:

Rising temperatures.

Invasive species

Increased pollution

Forest fire.

answer: 45

explanationyou have to add as well to be it could be

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

not always but somethings can be reproduced in a laboratory.