Answer:
I think its Aa
Explanation:
Not very good at biology :/
Petrochemicals include many things, I would say All of the above. Hope this helped! :)
I think should do the trick A and D
A group of people are building a house. They have a large package of building materials that needs to be moved. A block and tackle, a type of pulley, is used to pull the material up so it can be set in the back of a truck.
