B will study science as it relates to the areas of his interests by watching science videos, reading related written materials, 
(B; will study; science; T:as it relates to the areas of his interests by watching science videos, reading related written materials) (it; relates; to the areas of his interests)
B it
will study relates
science T:as it relates to the areas of his interests by watching science videos, reading related written materials
to the areas of his interests