The requirements for kosher eggs primarily focus on their physical characteristics and the source from which they come. The correct answer emphasizes the characteristics of the eggs themselves: a pointed end and a rounded end, with a yellow yolk surrounded by white.
In Jewish dietary law, kosher eggs must come from kosher birds, which typically include domesticated species like chickens, ducks, and quails. The shape and appearance of the eggs help in identifying their freshness and whether they meet the standards for kosher consumption. The yolk being yellow suggests it's healthy and suitable, while the white serves as the protective layer around the yolk.
The other options do not align with the primary requirements for kosher eggs. For example, while free-range and organic standards are often valued by many consumers, they are not designated as requirements for eggs to be considered kosher. Kosher laws focus primarily on the species of the bird and the egg's physical integrity rather than the farming practices involved.