10 grams
Which is the best estimate for the mass of a duck?
3 grams
1kg
250 kilograms
1 gram
15kg
A typical baseball bat weighs around 0.9 to 1.1 kilograms.
A paper clip has a mass of about 1 gram. A large baseball bat has a mass of about 1 kilogram. Based on these two examples, 1 gram (the mass of 1 paperclip), and 10 grams (the mass of about 10 paperclips) is far too light. 10 kilograms is equivalent to the mass of 10 large baseball bats, which is far too heavy for the mass of a pair of sneakers, so the best estimate for the mass of a pair of sneakers is 1 kilogram.
0.2 grams
1 gram
50
That depends a lot WHAT you want to estimate about the lemon - which of its qualities, e.g., its mass, its diameter, its sourness, its color, etc.