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La solución es eficaz y logra un cambio notable.

La solución es eficaz y logra un cambio notable.
The solution is effective and achieves a notable change.
From Lesson 248:Formal contrast (sin embargo)·Spanish (Latin America)

Questions & Answers about La solución es eficaz y logra un cambio notable.

Why do we use es instead of está with eficaz?
We use es (from the verb ser) because being effective (eficaz) is described here as a fundamental characteristic of the solution, not just a temporary condition.
If there were multiple solutions, how would the spelling of eficaz change?
It would change to eficaces. When a Spanish adjective ends in -z, you must change the z to a c before adding the plural -es suffix (las soluciones son eficaces).
I often see lograr used to mean 'manage to'. Does it mean something different here?
Yes. When lograr is followed by an infinitive verb, it means 'to manage to do something'. But here, it is followed by a noun (un cambio), so it translates directly as 'to achieve' or 'to attain' that noun.
This lesson is about sin embargo (however). How would I use it to add a contrasting idea to this sentence?
Because this sentence presents a very positive statement, it sets up a perfect contrast for your current lesson. You would typically use a semicolon or a period, followed by sin embargo, to introduce a drawback. For example: La solución es eficaz y logra un cambio notable; sin embargo, es muy costosa (...however, it is very expensive).

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