Question

the red liquid shows up when the mushroom is young. the mushroom grows in this period of its life. after that time, the liquid goes away. the mushroom turns light brown. it is old. as the mushroom grows older, the red liquid goes away. look at the meaning of \period\ in the chart. which clue helps you understand what \period\ means? word: period; clue: ?; meaning: when something happens

Explanation:

To determine the clue for "period", we analyze the context. The sentence "After that time, the liquid goes away" uses "time" which is related to "period". The phrase "this period of its life" (when the mushroom is young and has red liquid) and "after that time" show that "time" is a clue connecting to "period" meaning a time when something (the red liquid showing) happens. The relevant clue from the text is "time" (from "After that time").

Answer:

The clue is "time" (from the sentence "After that time, the liquid goes away"). This clue helps as "period" in "this period of its life" refers to a time frame, and "time" in the subsequent sentence is a synonym - like context clue showing "period" relates to a time when the mushroom is young (and has the red liquid).