Suppose an experiment was conducted where all of the rabbits were removed from a meadow. Which of the following results is least likely to be observed?

(1) The predator population, such as hawks, would decrease.
(2) The grasses and shrubs would grow taller and fuller.
(3) Flea and tick populations would increase.
(4) Other small herbivore populations would increase.

Option 1 and 2 are correct

Explanation:

In a given ecosystem rabbits serve as prey for several predators. The growth of predator population is depended on the population of rabbits. The higher the population of prey, the higher is the population of predator.  

Thus, if the population of rabbit is decreasing, then the population of predator such as hawks will decrease.  

Since the rabbits eat grasses and shrubs, thus in their absence the productivity of grasses and shrubs will also increase.

Option 1 and 2 are correct

that would be called plucking : )

explanation:

''plucking, also referred to as quarrying, is a glacial phenomenon that is responsible for the erosion and transportation of individual pieces of bedrock, especially large "joint blocks". as a glacier moves down a valley, friction causes the basal ice of the glacier to melt and infiltrate joints (cracks) in the bedrock."