Final answer:
True. Tall stratovolcanoes like those in Hawaii embody massive geological structures of great strength, and can serve as important sites for activities such as astronomy.
Step-by-step explanation:
A statement that a tall stratovolcano appears to be a mountain of strength can be considered true. Stratovolcanoes, such as the ones found in the Hawaiian Islands, are indeed impressive mountains formed by layers of hardened lava, tephra, pumice, and volcanic ash. Hawaii's tallest mountain, Mauna Kea, is not only a dormant volcano but also the site for significant astronomical research due to its height and location.
In comparison to Earth's geology, Mars presents an even more extreme example with Olympus Mons, a massive shield volcano that is nearly 500 kilometers wide and over 20 kilometers high, dwarfing any mountain on Earth and illustrating the immense potential strength and scale of volcanic features.