If you wanted to research more about the climate and living conditions on Mars, which website would give you the most credible (trustworthy) information?
A. "Life on Mars": A blog post that predicts what plants would grow best on Mars.
B. Mission Mars: A website that provides Mars-related merchandise for purchase.
C. "Surviving Mars: An Astronaut's Tale of Adventure": A fictional account of an astronaut's
survival on Mars.
D. Mars: An Inside Look: A scientific reference book that explains the difference between
conditions between life on Earth and life on Mars.

This is always in the form of "to" + a verb-like word. this verbal unit in a sentence actually acts as a noun, adjective, or adverb, rather than a verb. example: ("to carry," "to think," "to laugh")

(1) fire extended humans’ geographical boundaries by allowing them to travel into regions that were previously too cold to explore. (2) it also kept predators away, allowing early humans to sleep securely. (3) fire, in fact, has been a significant factor in human development and progress in many ways. (4) other obvious benefits of fire are its uses in cooking and in hunting. (5) probably even more important, however, is that learning to control fire allowed people to change the very rhythm of their lives. (6) before fire, the human daily cycle coincided with the rising and setting of the sun. (7) with fire, though, humans gained time to think and talk about the day’s events and to prepare strategies for coping with tomorrow. the sentence that expresses the main idea is: (type the number of the sentence. then click “go.”)

Which sentence from the story best illustrates how jeannette feels about her family’s choice of vacation?