Energy input would be what's giving the source energy. Energy output is what energy it's giving out.
I think it’s D vacuoles, I’m not certain but it don’t hurt to try if it’s not that try A
Discontinuous variation <span> refer to large, conspicuous differences from the parents</span>
This is where individuals fall into a number of distinct categories, and is based on features that cannot be measured across a complete range
continious variation refer to small, indistinct differences from the normal condition.
Milk yield in cows, for example, is determined not only by their genetic make-up but is also significantly affected by environmental factors such as pasture quality and diet, weather, and the comfort of their surroundings