During the Israelites' 40-year journey through the wilderness after the Exodus from Egypt, God provided them with food in two forms: manna and quail.
Manna is described in Exodus 16:14-31 as a fine, flaky substance that appeared on the ground each morning after the dew evaporated. It was white like coriander seed and tasted like wafers made with honey. The Israelites were instructed to gather only enough for each day (with a double portion on the sixth day for the Sabbath). Any excess kept overnight (except before the Sabbath) would spoil with worms. The name "manna" comes from the Hebrew question man hu? meaning "What is it?" because the Israelites did not recognise it when they first saw it.
Quail was provided when the people complained about the lack of meat. In Exodus 16:13 and Numbers 11:31-32, God sent large flocks of quail that settled around the camp, providing the Israelites with meat.
The other options are not accurate. Wheat, honey, grapes, wine, fish, and bread, while mentioned elsewhere in Scripture, are not what God specifically provided as the primary sustenance during the wilderness wandering.