I need help fast I’m so confused on this it’s just AH

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.

Label the offspring chromosomes a1, a2, b1, or b2. circle any mutation chromosomes.