Mainly #2 but if you want to help with the others, go for it!

it becomes positively charged by charging it

where’s the list ? the question is incomplete

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.