Answer:
a volcanic eruption must have occurred nearby which scared the sea creatures away
Explanation:
most sea creatures are scared by volcanic eruption
Chromatin is remodeled and nucleosomes are repositioned, thereby making specific regions of the DNA available for transcription
To provide energy to the body.
Answer:
Fine focus.
Explanation:
If you're referencing a microscope, then it would be fine focus. Coarse focus is a basic focus used to properly see a specimen, while fine focus enhance clarity and precision. To use both, you have to gently twist a knob until you can see the specimen at a desired clarity.
Here's a reference image if you need it, it's labeled all the parts of a microscope.