A population of an animal decreased, and it is believed to be due to industrialization (pollution). What is the first steps that should be taken when attempting to identify the reason for the decrease in population?

An engineer decides to use a slightly weaker material rather than a stronger material, since she knows that the stronger material can break suddenly. this is an example of what? a choosing a material that will show warning before it fails b using composite materials that combine strength c using a material for multiple applications d using design techniques that increase efficiency and reduce cost