The brightness of a star depends on how much light is released by the star and how far the star is from earth. there are two ways to describe a star's brightness.
a star's brightness is the brightness seen by humans on earth. a star's brightness is its actual brightness and does not depend on where the star is viewed from.
a. apparent, absolute
b. absolute, apparent
c. terminal, initial
d. initial, terminal

Answer.

A – apparent, absolute

Explanation:

Since, the apparent brightness is the brightness seen from the earth whereas the absolute brightness is the brightness that star would have when it would have been at a standard distance. Hence, correct answer is apparent and absolute brightness.

Thus, the correct answer is option). A.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

ionic bonds are two oppositely charged ions that attract. a sodium ion has a 1 positive charge; a chloride ion has a 1 negative charge. sodium and chloride have oppostive charged ions that attract which forms an ionic bond. a chemical bond formed when two atoms share electrons is called