The black sand beaches in hawaii are comprised of

lava and  basalt rocks,

Explanation: Black sand comes from eroded volcanic material such as lava, basalt rocks, and other dark-colored rocks and minerals, and is typically found on beaches near volcanic activit

i just got this problem. it's 90.3

i believe the answer is c. "baking" is the gerund, while "baking blueberry muffins" would be the gerund phrase. hope this ! : )