The following symptoms are usually present in a specific disorder. What disorder?
weak muscle tone, feeding problems
slow development, intellectual impairment
food obsession, insatiable appetite, obesity
problems with temper and compulsive behaviors:

a) Childhood Obesity Syndrome

b) Prader Willi Syndrome

c) Beckwith Weidermann Syndrome

d) Angelman Syndrome

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

name and explain one of the event that occurs during meiosis that increases the variation in offspring even more than simple reproduction?

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.

the last one: artificial selection/genetic engineering

plant breeding is modifying the genetic composition of the plant - but this isn't cloning (which is specifically introducing a gene into a genome). but you are artificially selecting for the phenotype that you want.

the second one is literally genetic engineering - the gene would have been cloned first and then inserted or genetically engineered into the new plant cell (the cotton).