4. Explain how a star is similar to the Sun if it has the same absorption lines in its spectrum that occur in the Sun's spectrum

always include the steps and/or background required to get to the final answer. let’s other people understand and solve future problems on their own.

answer; the best answer is (demand);

i looked up you question and i found this on quizlet i hope this is one of your answer choices.

modern american cars are not available due to trade restrictions

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.