Plz help me well mark brainliest if you are correct!!..

4

Explanation:

Four major federal land management agencies—the Department of Agriculture's Forest Service and the Department of the Interior's Bureau of Land Management (BLM), Fish and Wildlife Service (FWS), and National Park Service (NPS)—are responsible for managing about 95% of these lands.

the formula would be mgso4

mgso[subscript]4

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e