Learn Hardcore Spanish (Latin America): Las conchas que traje de la playa son frágiles también, guárdalas con cuidado. - The shells I brought from the beach are fragile too, store them carefully.

Que is a relative pronoun here. It connects the noun conchas (“shells”) with the clause traje de la playa (“I brought from the beach”). In English you’d say “the shells that I brought from the beach.” Spanish does not change que for gender or number in these cases.

Why is traer used instead of llevar?

Spanish distinguishes by speaker’s viewpoint:

Traer = “to bring” (toward the speaker or current location)
Llevar = “to take” (away from the speaker toward another place)
Since the speaker has already brought the shells to where they are now, traje (preterite of traer) is the natural choice.

Why is traje in the simple past (pretérito) and not in the present perfect (he traído)?

In Latin American Spanish, completed actions are most often described with the preterite (pretérito) rather than the present perfect. English learners often overuse he traído, but saying traje simply states “I brought” as a finished event.

Why is también placed after frágiles instead of before the verb?

Spanish adverbs like también (“also”) are fairly flexible, but they commonly follow the word they modify when that word is an adjective. Here you’re emphasizing that the shells are fragile too:
Las conchas … son frágiles también.
You could also say también son frágiles, but that slightly shifts the focus onto the shells being an additional thing that is fragile, rather than emphasizing the adjective itself.

Why does frágiles carry an accent on the á?

Frágiles is an esdrújula word (stress on the third-to-last syllable: frá-gi-les). Spanish orthography requires that all esdrújulas bear a written accent, hence frágiles.

What does guárdalas mean, and how is it formed?

Guárdalas is the affirmative tú-command of guardar (“to store, to keep”) plus the direct-object pronoun las (“them,” referring back to conchas).
• Imperative of guardar: guarda (“store/keep!”)
• Add pronoun las: guarda + las → guardalas
We write guárdalas as one word because Spanish requires clitic pronouns to attach to affirmative commands.

Why does guárdalas have an accent on the á?

When you attach a pronoun to an affirmative command, you often shift the natural stress. To preserve the original stress of guarda (which falls on the first syllable), you add an accent:
guarda → guárdalas

What does con cuidado mean, and why is con used?

Con cuidado literally means “with care.” In Spanish, to express “doing something carefully,” you often use con (“with”) + noun (cuidado = “care”). It functions like an adverbial phrase:
guárdalas con cuidado → “store them with care” / “put them away carefully.”