Read the following Assertion and Reason and choose the correct option. Assertion: Ecologists warn that if the present trends continue, nearly half of all the species on earth might be wiped out within the next 100 years. Reason: The current species extinction rates are estimated to be 100 to 1,000 times faster than in the pre-human times, primarily due to human activities.

Step-by-step solution

The Assertion correctly warns about the potential wipeout of nearly half of all species on earth within the next 100 years if present trends continue. The Reason provides the correct explanation, stating that the current species extinction rates being 100 to 1,000 times faster than in pre-human times are primarily due to human activities, which leads to the alarming scenario described in the Assertion.