Yahoo: Acid reflux impacts about 20% of American adults. What causes it? RealClearScience: Indigestion Is Common.

Understanding the Context

Here's When You Need to Worry About It Indigestion can ruin even the best of meals, leaving you with bloating, heartburn and discomfort that lingers long after you’ve pushed away from the table. While most people assume spicy foods or ... News Medical: Inflammatory response prompted by secretion of cytokines causes acid reflux damage in GERD patients Inflammatory response prompted by secretion of cytokines causes acid reflux damage in GERD patients In both situations there is a lack of resources which causes people to die. This sentence should be read as follows: there's a lack of some resources, and it is this lack that's causing deaths.

Key Insights

In effect, without those resources people die; the resources help avoid death. Unfortunately, there's a lack of those resources. This sentence makes sense, and is what you probably want to write. grammar - When should I use "cause" and "causes"? - English Language ...

Final Thoughts

Or: Is this the only factor that causes such tragedies? In that form, the singular factor matches with the verb causes. Your sentence mixes the plural rooms with the singular factor, making it hard for you to figure out which form the verb cause (s) should take. (This isn’t necessarily ungrammatical, but sometimes this can make a sentence ...