Are the forces that cause lava to erupt from volcanoes and flow over earth's surface constructive or destructive forces? explain.

Destructive because lava destroys things

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.