Well i would put them in order and then make it start from easy to hard because i like to understand the processes of the formation of the words
Chemical Pollution. Power plant is related to chemical.
What is the purpose of the motion
The answer is A The dog can't help is negative because because it has the word can't and but chase the cat is negative because a cat is being chase by a dog and the dog might even kill the cat.
The answer is : C, to show how a problem was solved by an invention
Why: he wanted to see if the key he had on the bottom would attract lightning or not.
