How does science restore diversity to areas where human activity has interfered with the natural structure of a habit/ecosystem?

Which best represents the law of conservation of mass ?

Can you match these to the correct definition

Aball thrown by ginger is moving upward through the air. diagram a shows a box with a downward arrow. diagram b shows a box with an upward arrow. diagram c shows a box with a downward and upward arrow equal in size. diagram d shows a box with a downward and upward arrow with the downward arrow larger in size. which force diagram represents the forces on the ball? you may neglect the effects of air resistance.