1. Rickets occurs when a child's growing bones do not develop due to vitamin D deficiency.

2. Vitamin D is an essential nutrient that helps in the absorption of calcium and phosphate.

3. Symptoms of rickets include.

- Pain and tenderness in the bones of the feet and hands

- curvature in the bones of the legs

- pain in shoulders and hips

- muscle weakness

Explain: -Internal profit are made to firms when they expand their products. High level productivity, labour-division and modern equipments when used in better way, then internal profit is made. They are called as internal because firms increase their quality & quantity of production then only they gain internal profit.

Flat Mirror (or Plane Mirror): Reflects light without distorting the image. The image formed is erect (upright) and of the same size as the object, but reversed from left to right.

Convex Mirror: Also produces an erect image. The image formed is virtual (cannot be projected onto a screen), smaller than the actual object, and upright.

Both flat and convex mirrors can create upright (erect) images of real objects.

Explanation: Agriculture and cattle herding were the primary occupations of the Vedic people.

Bengal Partition

1. In 1905, Lord Curzon divided the Bengal province of India into two parts.

2. West Bengal was Hindu majority, while East Bengal was Muslim majority.

3. The purpose of this partition was to create a Muslim-majority province in India, but instead, it led to communal tension and strengthening of the Indian national movement.

4. Opposition to the Partition of Bengal was widespread across India, and it was eventually annulled in 1911.