What is an acid? a substance that can donate an h+ ion a substance that is alkaline a substance that has a high ph value a substance that can accept an h+ ion

The correct answer is "a substance that can donate an H+ ion".

Explanation:

An acid is defined as a chemical substance that neutralizes basic solutions and acts as a proton (H+ ion) donor. Most acids when are dissolved in water release a proton which can be donated to a different compound. Acids are proton donors and electron acceptors, while bases are the opposite.

i dont know it at allnow im just getting points at this pint

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.