Sand dunes protect beaches against erosion and flooding due to storms.
Which human activity would have the most negative impact on dune grasses and the coast?
driving vehicles along the beach
building houses near the beach
walking on the dunes of the beach
allowing kids to play on the beach

B. Building houses near the beach

Explanation:

it was right on edge

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.