Both the shoulder shrug and upright row work your levator scapulae, a muscle located on the back side of your neck. This muscle is integral in movements of your spine and scapula, located in your upper back, below your shoulders.
Shallots are a member of the allium family, just like onions, leeks, and garlic. While often thought of as smaller, milder onions, shallots are their own species and aren't simply small onions. They have a slightly sweeter edge than most onions, especially when cooked.
There are a few ground rules, though. 1 small onion = 3 small shallots. If the recipe calls for cooked shallots, go ahead and swap in onions, using the rule of thumb above for quantities. If the recipe calls for raw shallots, move on. Raw onions will be a too-harsh trade for shallots. Also, since shallots are smaller, with more fine layers than onions, make a point to chop onions into smaller pieces when using them in place of shallots.