Answer:
Uncle , Cousin, Grandmother , Aunt , Brother , Grandfather
Explanation:
Arranging in the order of increasing height simply means starting from the shortest to the tallest ( ascending order )
Number of relatives = 6
Uncle , Aunt , cousin, grandmother , grandfather, Brother
First lets write out the relationship between your relatives using a feet as our S.I unit
Uncle is shorter than Aunt by ; 1/2 feet = 0.5 feet
Cousin is shorter than Aunt by : unknown value
Cousin is shorter than Brother by ; 1/4 feet = 0.25 feet
Grandmother is shorter than Grandfather by ; 0.16 feet
Aunt is shorter than Grandfather by ; 0.03 feet
Aunt is shorter than brother by ; 0.08 feet
Hence the list of relatives in ascending order
Uncle , Cousin, Grandmother , Aunt , Brother , Grandfather