Based on the above quotes, what evidence is there that the oregon trail pioneers faced hunger on the plains?

Based on the quotes, the evidence that the Oregon trail pioneers faced hunger on the plains is the following.

The quotes describe life on the Oregon Trail. This was the trail pioneers used in the mid 19th century to move from Independence, Missouri to Oregon City, Oregon. It was a long 2,000-mile road to the new territories. The quotes present the testimony pioneers J. G. Bruff in 1849 and  Clark Thompson in 1850: "Counted 150 dead oxen." "It is difficult to find a camping ground without carcasses." "Looked starvation in the face. I have seen men passing an animal that has starved to death on the plains, stop and cut out a steak, roast and eat it and call it delicious."

These affirmations proved that the Oregon trail pioneers faced hunger on the plains.

rain should be the answer.