The correct answer is d. it is mainly there to prevent any noxious substance from inner into the gut.
<span>
An omentum is a layer of the peritoneum (the serous membrane that lines abdominal cavity) that surrounds abdominal organs. It is known that omentum plays a role in immune responses. Omentum contains the clusters of white blood cells (lymphocytes), called “milky spots” which have the first-line defence role in the immune system. When a noxious substance is present, the "milky spots" induce the release of inflammatory molecules.</span>
True.
Precipitation is a water cycle process that happens when tiny droplets of liquid falls from the atmosphere it was settling. The hydrogen and oxygen mix back together and forms the water droplet altogether as it falls.
The water cycle involves other process from evaporation, condensation and precipitation.
No the sun is actually a very small star compared to a lot of others it just appears to be very big because of how close it is to our planet