What word best describes the meaning of food webs

Iam stuck on this question! 45 points : ) how do increases in temperature affect the density of ocean water? answer choices: (a) density does not change (b) density increases (c) density becomes variable (d) density decreases

Distance that the transcontinental railroad covered from omaha to san francisco.

This word for a bug or malfunction was popularized in the 1962 book into orbit by the mercury astronauts