Radical 灬
13 strokes
obvious 昭 (597a) + fire 灬 (185a) = shine 照
This character has two meanings: “to shine on, illuminate”; and “to look after, care for”.
照顾 (567) zhàogù look after, care for
照相 (163) zhàoxiàng to take a photo
[关照 (372) guānzhào take care of; notify]
[照片 (353) zhàopiàn photograph]

The obvious way to get the fire started is to shine focused sunlight onto it. / The dwarf gets his old jousting shield (and uses the concave side of it as a magnifying mirror).