Step 1: What we must show:
We want the statement that proves disability has a social side. The test is simple: does the statement tie disability to how society is arranged, or only to one person?
Step 2: The social view of disability:
In sociology, disability is seen as something that society creates or makes worse through poverty, poor access and attitudes. The strongest textbook example is the two way tie between being poor and being disabled.
Step 3: Option 1:
Poverty is a social condition. When disability and poverty go together, it shows that social factors matter. This fits the test, so we keep it.
Step 4: Option 2:
A belief about a past life explains disability through fate. It is a personal belief, not a social structure, so we drop it.
Step 5: Option 3:
Climate change is a natural and global issue. It is not the usual point used to show a social category, so we drop it.
Step 6: Option 4:
Linking disability with individual ability keeps the focus on one person's body. This is the individual model, so it cannot show a social category. We drop it.
Final Answer:
Only option 1 passes the test. \[\boxed{1}\]