Question

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\sunflowers got their name not only because their blossoms are round and yellow but also because the plants are heliotropic.\
what does the word \heliotropic\ mean in this context? use these dictionary entries to answer the question:
helio- (prefix) related to the sun or sunlight
-tropos (suffix) turning
plants that give off light
plants that swivel to face the sun
plants that are warm to the touch
plants that thrive in full sun

Explanation:

To determine the meaning of "heliotropic", we analyze the prefix and suffix. The prefix "helio - " relates to the sun, and the suffix " - tropos" means turning. Combining these, "heliotropic" should relate to turning toward the sun. Among the options, "plants that swivel to face the sun" matches this meaning. The other options: "give off light" is incorrect (sunflowers don't emit light), "warm to the touch" is not related to the word parts, and "thrive in full sun" describes growth preference, not movement toward the sun.

Answer:

B. plants that swivel to face the sun (assuming the second option is labeled B; if the original options had no labels, but based on the order, the second option is "plants that swivel to face the sun")