How would the isobar
lines be oriented if there was no
air pressure change across the
land-water boundary?

Answer (d) may increase or decrease porosity through dissolution or deposition;

Your answer is d. silli hope this ! : ) i left an explanation down below if you need it: a sill forms when hot magma squeezes between layers of rock to form a hardened sheet of rock. a sill is basically a tabular sheet intrusion between old layers of sedimentary rock, volcanic beds, or in the direction of foliation inherent in metamorphic rock. the word sill means a concordant intrusive sheet.

The correct answer is:   [b]:   "distortion" .