The tennis ball. Because of less mass
New varieties. Natural selection and selective breeding can both cause changes in animals and plants. The difference between the two is that natural selection happens naturally, but selective breeding only occurs when humans intervene. For this reason selective breeding is sometimes called artificial selection.
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1. Balances fluids.
2. Structure. Support for tissues.
The answer is depth and type of fluid. Type of fluid essentially means its density. Denser fluid exerts more pressure compared to less dense fluids. Additionally, the bigger the depth in the fluid, the more the pressure due to the column of the fluid above. The following formula is used to calculate this pressure of a static fluid;
Pstatic fluid = ρgh where;
ρ = m/V = fluid density
g = acceleration of gravity
h = depth of fluid