Why do plants need minerals such as Nitrogen and Phosphorus?

In order to build DNA and Proteins

They need Nitrogen and Phosphorous in order
to reproduce

They need Nitrogen and Phosphorous in order
to do Cell Respiration

They need Nitrogen and Phosphorous in order
to do photosynthesis

the statements that apply here about binary star system are

"have stars that might appear to wobble"

"often have one star that is brighter than other"

a binary star is a star system consisting of two stars revolving around their common barycenter. systems of two or more stars are called multiple star systems.