A scientist obtains images of a particular star, which appears as four separate stars. Which phenomenon causes the star to appear this way?

O redshift
O gravitational lensing
O principle of equivalence
O gravitational time dilation ​

some think that theories become laws, but theories and laws have separate and distinct roles in the scientific method. a law is a description of an observed phenomenon in the natural world that hold true every time it is tested. it doesn't explain why something is true; it just states that it is true.

the answer would be a

the components of a vector are the parts of the vectors that are to each other.

b perpendicular