Piensa would be the correct answer since Marsha is the same as saying él/ella/usted, and for -ar verbs the conjugation for third person is -a
1. Lionel Andrés Messi
2. Lorena Ochoa
3. Miguel Cabrera
4. Paola Milagros Espinosa Sánchez
Explanation:
Relative density is the ratio of the density (mass of a unit volume) of a substance to the density of a given reference material (i.e., water). It is usually measured at room temperature (20 Celcius degrees) and standard atmosphere (101.325kPa). It is unitless.
1. trabajaría
2. trabajaríais
3. leería