Choose all of the correct statement that could change the ph in a small lake enough to decrease the chances of survival of these aquatic organisms.

new coal-burning plant opens up next to the lake.

the widget industry dumps its waste into the lake.

there is a decrease in the acidity level of rain in the area.

a new predator moves in and eats the trout.

an invasive species of clams is introduced.

1. A new coal-burning plant opens up next to the lake.

2. The widget industry dumps its waste into the lake.

3. There is a decrease in the acidity level of rain in the area.

Explanation:

H. Mantle

Explanation:

Convection currents are identified in Earth's mantle. Heated mantle material is shown rising from deep inside the mantle, while cooler mantle material sinks, creating a convection current. It is thought that this type of current is responsible for the movements of the plates of Earth's crust.