Question

is the treatment of cancer.
but we must not forget that when radium was discovered no one knew that it would prove useful in hospitals. the work was one of pure science. and this is a proof that scientific work must not be considered from the point of view of the direct usefulness of it. it must be done for itself, for the beauty of science, and then there is always the chance that a scientific discovery may become like the radium a benefit for humanity.
adapted from marie curie, \on the discovery of radium\
based on the excerpt, what is the purpose of marie curies speech?
to explain the scientific properties and diverse uses of radium
to illustrate the importance of scientific inquiry for its own sake
to demonstrate both the benefits and dangers of chemistry

Explanation:

Marie Curie usa el ejemplo del descubrimiento del radio para enfatizar que la ciencia debe ser realizada por su belleza y no solo por su utilidad directa. Esto muestra que el propósito de su discurso es ilustrar la importancia de la investigación científica por sí misma.

Answer:

to illustrate the importance of scientific inquiry for its own sake