Question

How does natural selection lead to evolution?
a.
Stronger offspring kill weaker members of the species.
b.
Helpful variations accumulate among surviving members of the species.
c.
Overproduction provides food for stronger members of the species.
d.
Environmental changes favor weaker members of the species.

Answer 1

The answer is 
b. Helpful variations accumulate among surviving members of the species.

Answer 2

Answer:

The correct answer is option b.  "Helpful variations accumulate among surviving members of the species".

Explanation:

Natural selection is the most accepted theory of evolution, described by Charles Darwin in 1859. This theory explains that by the survival of the fittest, the helpful variations accumulate among surviving members of the species. The variations or mutations that are not helpful for the species are lost by predators and environmental factors, while the helpful variations remain in the surviving members, which leads to the species evolving to have improved characteristics.