Combine the two ideas into a single sentence.

Which of the following always exist between two objects having mass ● elastic force ● contact force ●gravitational force ●magnetic force

What are the three stages of volcanic activity? a. active, magma, lava c. extinct, eruption, explosive b. eruption, quiet, explosive d. active, dormant, extinct

In this food web, which group would increase in number if snakes were eliminated? a. producers b. decomposers c. primary consumers d. secondary consumers e. tertiary consumers