1. criteria the requirements that must be met for an engineering solution to be successful. Requirements, that the design needs to meet.
2. constraints anything that limits the device design or possible designs.
Think about the wave energy converter. Describe in detail 1 criteria and 1 constraint for the design of the
wave energy converter.

the cold front replaces the warmer air at the ground level changing the wind to be breezy and denser.there is also an immediate drop in the temperature.

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.