What is the main function of the central vacuole in a cell?
a. breaks down molecules to release energy
b. absorbs energy from the sun to produce food
c. contains the cell's genetic material
d. holds water and maintains turgor pressure

It's D because a is mitochondria that performs cellular respiration, where b is a chloroplast hat carries on the photosynthesis. C however is the nucleus that contains chromosomes which carries DNA. But D, the vacuoles function is to control the storage of the water and its pressure and etc.

Well if you pick a machine to work on and that's gonna be your exercise if you don't stick to that machine your muscle strength your muscle mass rather will change because you haven't been doing it you change something in your exercise routine which changes your body's form of dealing with things for example you might become weaker or stronger depending on what kind of exercises you do in whether or not the machine you picked actually your muscles grow.