Someone help me

3rd option

Step-by-step explanation:

The volume (V) of a sphere is calculated as

V = πr³ ( r is the radius )

Given diameter = 4 then r = 4 ÷ 2 = 2 cm

V = π × 2³ = π × 8 = cm³

combined volume = + 20π = + = cm³

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.