All of the above responses are correct and contribute to the difficulty in finding the age of Earth. The constant changing of Earth's surface, both through erosion and geological processes, can make it challenging to accurately determine the age of certain features or rock formations. Additionally, the movement of tectonic plates and shifting of continents adds another layer of complexity in determining the age of Earth. The existence of multiple layers of Earth also presents challenges as each layer may have formed at different times and have different ages. Lastly, while there are various methods to estimate the age of rocks, such as radiometric dating, they are not always applicable or accurate in all cases, further complicating the process of finding the age of Earth.
