The phrase 'necessity of support' is correct and usable in written English.
You can use it when you want to stress the importance of providing help or assistance to someone or something. For example, "Given the severity of the situation, there was a real necessity of support from the government."
The Body Shop was famously born out of pure necessity of supporting two children during Gordon's equine adventure.
A rationalist, he insisted upon the necessity of supporting any theory with concrete evidence and experimental proof.
It sometimes seems like the one subject the candidates agreed on is the necessity of supporting your country, a former Soviet satellite state that has recently been warring with Russia.
If the time-series directional change in mono- and oligonucleotide composition found for EBOV is actually due to the necessity of supporting efficient growth in human cells (Model 2), such directional changes should be observed for other zoonotic RNA viruses.
They may have that effect by relieving middle-aged adults of the necessity of supporting their parents, and thereby directing those resources to their own children instead, but that is not the program's focus.
According to those who hold such an opinion, the Gulf countries have reached a consensus over the necessity of supporting the secular movement in Egypt.
The Chibok girls became a symbol of even greater problems: for the international community, the necessity of supporting girls' education in the face of religious extremism; for many Nigerians, the government's failure to protect its most vulnerable citizens from Boko Haram.
Further research is necessary to investigate these possibilities, but the necessity of supporting all caregiver/dependent relationships is clear.
The necessity of supporting the agri-environment in Israel derives from the need to mitigate threats to the supply of agri-environmental services and the negative impact of agriculture on the environment.
Recent publication of two RCTs dealing specifically with severe exacerbations requiring ventilatory support allowed a stratified analysis according to the necessity of ventilatory support in the ICU.
