This verse refers to the necessities of life: Food and security. Food is necessary for staying alive and security is not less importance that it, for the human being is always afraid of losing the blessings or facing a calamity, thus, the greatest gift of Allah (swt) on human beings is that He (swt) had guaranteed to save them from hunger and safe them from fear. The Prophet (saws) said:
“Whosoever begins the day feeling family security and good health; and possessing provision for his day is as though he possessed the whole world.”
 Sunan At-Tirmidhi, The Book of Miscellany, hadith No. 2346.