Question

Please give me the awnser

Answer 1

Number 3: It is needed for DNA

Answer 2

`\huge \boxed{\mathfrak{Question} \downarrow}`

• Why is phosphorus an important biological molecule.

`\large \boxed{\mathfrak{Answer \: with \: Explanation} \downarrow}`

• Phosphorus is an important biological molecule because it's needed for DNA.
• Phosphorus is an important structural element in DNA. DNA has a sugar - phosphate backbone.