Although it may not be obvious, another devastating mass extinction event is taking place today the sixth of its kind in Earth's history. The trend is hitting global fauna on multiple fronts, as hotter oceans, deforestation, and climate change drive animal populations to drop in unprecedented numbers. These alarming extinction trends are driven by one key factor: humans. According to a 2014 study, current extinction rates are 1,000 times higher than they would be if humans weren't around. A summary of a United Nations report released last month put it another way: "Human actions threaten more species with global extinction now than ever before," the authors wrote.
Answer:
<em>D - Families.</em>
Explanation:
In the periodic table of elements, there are seven <em>horizontal rows</em> of elements called <em>periods</em>. The <em>vertical columns</em> of elements are called <em>groups, or families.</em>
Photovoltaic solar panels.
Answer:
Option B, temperature, water and soil nutrients
Explanation:
Abiotic factors are those which do not have life in them and are unable to exhibit the functions of a living organism such as locomotion, reproduction, feeding, respiration etc.
All the set of factors in option B i.e temperature, water and soil nutrients are not living things as they do have any of the characteristics of living beings and thus they can be considered as abiotic factors.
While in all other options except option B, i.e option A, C, and D factors like animal, grass and animal life are biotic factors as they have life and are able to perform functions of living beings.
Thus, abiotic factors associated with ecosystems are temperature, water and soil nutrients