it's the last one because it's depended on the rock layers
Answer:
A
both forms of energy referred to in the question is light and heat energy
light energy is the visible energy that travels at a known constant speed of 3.0×10^9m/s
while heat energy is the invisible energy that travels in form of radiation at variable speeds
(4) Zirconium
This element is often used in the chemical production field, and as implants due to its high chemical resistance and stability.
