El científico descubre la fórmula matemática. question 2 with 1 blankmarcos rompe los platos de porcelana. question 3 with 1 blankesteban y maría vuelven de costa rica. question 4 with 1 blankel futbolista muere de un ataque al corazón. question 5 with 1 blankla actriz no dice nada a la prensa. question 6 with 1 blankhoy el caso se resuelve.

1. El científico descubrió la fórmula matemática.

2. Marcos rompió los platos de porcelana.

3. Esteban y María volvieron de Costa Rica.

4. El futbolista murió de un ataque al corazón.

5. La actriz no dijo nada a la prensa.

6. Hoy el caso se resolvió.

Explanation: The original exercise asks to convert the sentences to past simple. In Spanish, the simple past is also known as the pretérito perfecto simple and it is characterized by the fact that its grammatical tense is absolute (it is estimated from who speaks and in relation to the time in which the expression is conjugated and the verb will depend on the termination of the verb in the infinitive ("ar" "er" or "ir").

they need to keep water moving over their gills so they seem to have active periods and restful periods instead of undergoing deep  sleep.  they sleep swim

explanation:

b

explanation: