Blank is a characteristic of all living things and involves an increase in the amount of living material
in an organism

Growth

Explanation:

There are seven main characteristics of living things that define life. These include: Growth, Reproduction, Sensitivity, Respiration, Movement, Excretion, Nutrition.

Among these, Growth is an ability or characteristic of life  that involves in increase in the amount of living matter in any organism by the intake of food and production of energy. This process ensures that organism is increasing in size due to rapid increase in the cell division by uptake of food and production of energy.

Hope it helps!

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.

the answer is "a.) well–developed vascular system."

explanation: