What is isostasy dependent on a balance between

a the downward push of the continents and upward push of the mantle
b the downward push of the ocean floor and upward push of the continents
c the downward push of the ocean floor and upward push of the mantle
d the downward push of the continents and upward push of the mantle

Option (A) and (D)

Explanation: Isostacy is the gravitational state of equilibrium in which a block sinks down due to the addition of materials and also the same block rises up if materials are eroded.

          In terms of our earth, the gravitational force is responsible for the sinking or down-pushing of the continents, and the bouyancy forces in the mantle is responsible for the uplifting of the continents.

as a general rule, scissors have blades less than 6 in (15 cm) long and usually have handles with finger holes of the same size. shears have blades scissors used to cut hair or fabric must be much sharper.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.