Answer:
D
Explanation:
A and B can be eliminated for sure
The city of Los Angeles released 96 million "shade balls" into the Los Angeles Reservoir. These will serve to shield the water from the sun's heat in order to reduce evaporation and prevent algal and bacterial growth so no toxic substances are produced in the water. The balls reduce evaporation by 85%-90% so will save a lot of water yearly.
Answer:
Layer C is the youngest
Explanation:
On the image we can see three layers that have deposited throughout time on top of each other, thus in the manner of superposition. The deeper the layer, the older it is, the closer to the top the layer is, the younger it is, so we have layer D as the oldest, then comes layer B, and the youngest of those three is the layer A. But we also have the layer C that is roughly vertical, and it doesn't seem to belong there. This layer cuts through the layers D and B and stops at the bottom of layer A. This layer is actually an intrusion. It is a magma that managed to rise from the mantle and penetrate through the layers, gradually cooling off afterward and creating intrusive igneous rocks. This layer is the youngest of them all, as it appeared, formed, as the last.
It's magnetic field! Hope this helps :)