Answer:
2, 23 pairs
Explanation:
it is honestly the only one that makes sense
The focus is where the earthquake occurs the epicenter is the point directly above the focus
a specialized cell, group of cells, or organ of endothelial origin that selectively removes materials from the blood, concentrates or alters them, and secretes them for further use in the body or for elimination from the body — compare endocrine gland, exocrine gland.
Where is the image for the cells?
Correct answer - Frequency.
Why? - The frequency, is the number of waves that pass a certain point in a specified amount of time.
