What does the term "survival of the fittest" mean?

How would you describe the the organisms in the second row of model 1 that are connected to the parents by a line

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid

If 360 joules of work are needed to move and create a distance of 4 m what is the weight of the crate