Which of the following statements best describes the field of mechanical engineering
a. mechanical engineering deals with conversion chemicals into useful products
b. mechanical engineering deals with design, construction, and operation of machinery
c. mechanical engineering involves the design of electrical systems
d. mechanical engineering includes the design and constructions of roads, bridges and buildings.

The correct option is B.

Engineering has a subject has four basic sub specialties, these are: chemical, mechanical, civil and electrical electronic engineering. Mechanical engineering has to do with the design, construction and utilization of various types of machines. Mechanical engineers are always very good in subjects such as mathematics and physics. Mechanical engineering fully emerged as a field in the 18th century during the industrial revolution.

it would affect precipitation by causing flooding in some areas of the world due to climate increasing, causing the glaciers in the northern and southern pole of our planet to melt.

i wish you would have provided choices to simplify it and allow me to give an exact answer.