Which point of view focuses on the thoughts and actions of a single character at a time

Which best summarizes what scientists learned about how microbes benefit the human body? they are part of a normal human ecosystem. they have become less harmful to humans than they used to be. they process nutrients, fight disease, and accommodate change. they humans overcome the effects of antibiotics.`

Which sentence uses the verbs correctly?

Merhaba benim adım bamsu beyruk. what translation.