Answer/Explanation:
Petroglyphs were images made by picking or carving at the top surface of a rock. Other rocks and sticks were used as utensils to make this happen. Petroglyphs were most commonly engraved by prehistoric humans.
Answer:
Father's absence
Explanation:
A research was carried out to determine the influence of father's absence as a major risk factor for early sexual activity in girls. United States and New Zealand were used as case studies. Results from this study in addition to other numerous studies concluded that the absence of biological fathers from home is a risk factor for girls early sexual activities and also teenage pregnancy. This also affects their mental health and academic progress.
Conversely, the studies showed that, the presence of fathers in homes were major protective factor against early social activities and teenage pregnancies.
Explanation:
20 men can do 1 W in 36 days
=> 20 men can do 1/36 W in 1 day
=> 10 men can do 1/72 W in 1 day.
30 girls can do 1W in 36 days
=> 30 girls can do 1/36 W in 1 day
=> 12 girls can do 1/90 W in 1 day.
Together 10 men and 12 girls can do 1/72 + 1/90 W in 1 day
= 9/360 = 1/40 W in 1 day.
Therefore they need 40 days to do the piece of work.
The most important and one of the most criticism in regards
to Piaget’s theory of the cognitive development is that many of the cognitive
abilities are likely emerging earlier to children than of the Piaget thought by
which became the most important criticism because of this event.
He was a devout protestant leading him to expel Muslim and Jews from Spain.
