In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.

[EX Q]: Question: Sarah ate a piece of shark meat for dinner, Sarah's levels of toxic metals have
Answer: increased or
[EX A]: The higher up a food chain that humans eat, the greater the levels of toxic metals they take in.

[EX Q]: Question: Jeff noticed the food supply changed over time in his city. The advent of farming machines likely caused the food supply to
Answer: increase
[EX A]: Better farming techniques and machines increased the food supply and the distribution of food.

[EX Q]: Question: The darkest magma-produced minerals probably have _____ amounts of silica.
Answer: lower
[EX A]:
Magmas that produce lighter colored minerals are higher in silica.