Question

if earth was like a hardboiled egg, which part of earth would the egg yolk represent?
core, as it makes up the most part of earths diameter
core, as it lies between the crust and the mantle
mantle, as it lies between the crust and the core
mantle, as its depth is less than 100 kilometers

Explanation:

In the analogy of Earth as a hard - boiled egg, the yolk is the innermost part. Similarly, the core is the innermost layer of the Earth. The first option about the mantle's depth is incorrect as the mantle is much thicker than 100 kilometers. The second option is wrong because the mantle lies between the crust and the core. The third option is incorrect as the core does not lie between the crust and the mantle (the mantle does). The core is the innermost part, so it is analogous to the yolk.

Answer:

Core, as it makes up the most part of Earth's diameter (assuming this option is correct based on the fact that in the egg - Earth analogy, the yolk (core) is the innermost part. If there was a correct option stating "Core, as it is the innermost part", that would be more precise, but among the given options, the one about the core making up a large part (assuming diameter refers to the central position in a way similar to the yolk's central position in the egg) is the best fit).