Answer:
A heart transplant is an operation in which a diseased, failing heart is replaced with a healthier donor heart.
Explanation:
hope it kinda helps
The Sun's outer gases extend far beyond the photosphere (Figure 6). Because they are transparent to most visible radiation and emit only a small amount of light, these outer layers are difficult to observe. The region of the Sun's atmosphere that lies immediately above the photosphere is called the chromosphere.
The answer is d or c but I think it’s b. Hope this helps!
