It seems that you have missed the given options for this but anyway, here is the correct answer. <span>The Atlantic Ocean is currently growing wider as its floor enlarges due to the process of sea-floor spreading. In sea-floor spreading, pieces of oceanic crust MOVE APART ALONG A DIVERGENT PLATE BOUNDARY. </span>
I believe the first one is 'physical geography' :-)
A. Add up individuals who came into the area because of reproduction or immigration
The space time continuum meaning that time travel would be very much possible if humans could break the barrier of the 4th dimension
B. Allele is a form of gene.