The costs of modern communication continue to decline because of

a.
increased power of corporations
b.
increased usage and competition
c.
decreased capacity
d.
decreased speed of communication

The correct answer is option B. "increased usage and competition".

Explanation:

The communication industry has a lot of demand as people becomes more dependent of products and services such as a high speed internet connection, cellphones, computers and tv broadcast services. The communication industry has a high demand but also it has lowered their prices, mainly because the market increases every year and the competition increases due to more companies offering communication products and services.

c. taught scientists many new things about the earth, but not other planets.

explanation:

acts of terrorism occur globally. the united nations global counter-terrorism strategy was created in order to build adequate systems of support and solidarity with victims of terrorism. here´s a summary of the proposed key themes: the importance of giving victims a face and a voice; protecting their dignity; giving victims legal status and defending their legal rights; providing victims with medical, psycho-social and financial support; building solidarity with victims; improving media coverage of victims; and focusing on the link between victims and counter-terrorism efforts more generally.