What is the possesive form of the word seashells

The seashells' fragility made packing them in my suitcase almost impossible.

To form the possessive form of a word, you generally add an apostrophe followed by the letter "s" just after the word if it is singular. In the case of the word "seashells," the possessive form would be "seashells'" because the word is already plural.

Now, to understand why it's plural possessive, we break it down:
- "Seashells" is a plural noun because it refers to more than one seashell.
- To form the possessive of a plural noun, we generally add an apostrophe after the final "s" unless the noun already ends with an "s," in which case we add an apostrophe followed by "s."

So, in the case of "seashells," since it is already plural, we just need to add an apostrophe after the "s" to form the possessive: "seashells'."