Step-by-step explanation:
Hey, there!!
The possible reason is option no. b.
Because
- for the first option its absolutely wrong.
- For the second option there is variation of gravity in different places so, the weight differes. (as w= m.g)
- For the third option, the weight changes when the object is kept at top at once and low at once but for the third time again the object is replaced at same place. so, it only gives two different weights.
- 4th option is incorrect.
so, i think the answer is option B.