Genetically engineering endangered keystone species that are vital to the environment to be more resilient against harmful predators and/or toxins, pathogens, etc.
Answer:
Part a)

Part b)

Explanation:
Two sleds are connected by a rope
mass of each sled is given as

now we know that dog exert pulling force on the rope connected to first sled

Part a)
By newton's first law we know that




Part b)
As we know that force between two ropes will pull the sled behind
so we will have



We can answer this one very quickly. From the <em>Law of Conservation of Energy</em>, we know that "Energy can't be created or destroyed.".
So that only leaves us one way to complete the sentence in this question:
"One form of energy can be <em>transformed into</em> another type of energy.
" <em>(B)</em>