Question

1. with sea otters to keep the population of sea urchins in check, kelp forests can flourish. in fact, even two years or less of sea otter presence can reduce the sea urchin threat in a coastal area. without sea otters present, ____ kelp forests run the danger of becoming barren stretches of coastal wasteland known as urchin barrens.

a) nevertheless,
b) however,
c) hence,
d) likewise,

1. among the possibilities to reconfigure a building’s lighting is the installation of full - pane windows to allow the greatest degree of sunlight to reach office interiors. ____ businesses can install light tubes, which are pipes placed in workplace roofs to capture and funnel sunlight down into a building’s interior.

a) thus,
b) nevertheless,
c) alternatively,
d) finally,

Explanation:

Question 7

The first part says sea otters help kelp forests flourish by controlling sea urchins. The second part says without sea otters, kelp forests face danger. This is a cause - effect relationship. "Hence" is used to show a result or consequence. "Nevertheless" and "however" are for contrast, and "likewise" is for similarity, which don't fit here.

The first option for reconfiguring lighting is full - pane windows. The second option is light tubes. These are two different options or alternatives for reconfiguring lighting. "Alternatively" is used to present another option. "Thus" shows a result, "nevertheless" shows contrast, and "finally" shows a last step, which don't fit the context of presenting an alternative.

Answer:

C) hence,

Question 8