Answer:
D
Explanation:
The trout are disappearing from the river because of the thermal water pollution, which is causing the high water temperatures.
B. trenches .......................
The best way to avoid measurement error in an experiment is being shown in the option C. instrument precision which means that a tool is controlled very carefully in order to get the most accurate result, and the answer for your question is D. misreading the instrument as it is an opposite of what I have just said.
Answer:
Oil workers activities involved in the exploration of crude oil and natural gas creates pollution which affects the ecosystem negatively. The various pollutions cause the death of plant and animal life both on land and in water bodies.
The oil workers should be more careful in their activities to prevent oil spillage as much as possible and if there is any at all then there should be adequate measures in the cleaning it up efficiently through biological and harmless chemicals.
