Why is it more likely that a sea cave becomes a sea arch before becoming a sea stack?

Based on my research, I'd say it becomes a Sea arch before becoming a Sea stack due to the breaking waves erode, or wear away, the rock at sea level bit by bit, forming arches. Softer rock falls away more quickly than harder rock.

Explanation:

A sea stack is a pillar of rock that is cut off from the headland or cliff. When the waves erode the base of the sea arch, they widen it. Eventually, the roof is unable to support itself and it collapses, the former tip of the headland cut off as a sea stack.

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )